Lesión pulmonar aguda producida por transfusión (TRALI): Reporte de caso

Introducción: La lesión pulmonar aguda (TRALI) y la sobrecarga circulatoria (TACO) son las principales causas de morbilidad y mortalidad relacionadas con la transfusión. La TRALI se presenta durante o después de las transfusiones de plasma y sus derivados, o por inmunoglobulinas en alta concentración intravenosa; se asocia a procesos sépticos, cirugías y transfusiones masivas. La TACO es la exacerbación de manifestaciones respiratorias en las primeras 6 horas postransfusión. Reporte caso: Paciente de sexo masculino de 38 días de vida, ingresó al servicio de urgencias con un cuadro clínico de 8 días de evolución, caracterizado por dificultad respiratoria dado por retracciones subcostales y aleteo nasal sin otro síntoma asociado, con antecedentes de importancia de prematuridad y bajo peso al nacer. El reporte de hemograma arrojó cifras compatibles con anemia severa, por lo que requirió transfusión de glóbulos rojos empaquetados desleucocitados. El paciente presentó un cuadro respiratorio alterado en un periodo menor a 6 horas, por lo que se descartaron causas infecciosas y finalmente se consideró cuadro compatible con TRALI. Conclusiones: Se debe considerar una lesión pulmonar aguda relacionada con una transfusión de sangre si se produce una insuficiencia respiratoria aguda durante o inmediatamente después de la infusión de hemoderivados que contienen plasma.

Introduction: Acute lung injury (TRALI) and circulatory overload (TACO) are the main causes of transfusion-related morbidity and mortality. TRALI occurs during or after transfusions of plasma or its derivatives, or by immunoglobulins in high intravenous concentration; it is associated with septic processes, surgeries, and massive transfusions. TACO is the exacerbation of respiratory manifestations in the first 6 hours post transfusion. Case report: A 38-day-old male was admitted to the emergency department with clinical symptoms experienced over the course of 8 days and characterized by respiratory distress due to subcostal retractions and nasal flaring with no other associated symptoms. Important antecedents included prematurity and low birth weight. The hemogram report showed figures compatible with anemia, which benefited from transfusion of packed red blood cells without leukocytes. In a period of less than 6 hours, the patient presented altered respiratory symptoms, practitioners ruled out infectious causes and finally considered clinical signs compatible with TRALI. Conclusion: Acute lung injury related to blood transfusion should be considered if acute respiratory failure occurs during or immediately after infusion of plasma-containing blood products.

Amniotic fluid pulmonary embolism and COVID-19: Case report.

Amniotic fluid embolism is a rare complication of peripartum. It is caused by the entry of fetal components into the maternal systemic circulation. There are 2 main types: typical; it presents with the triad of hemodynamic collapse, respiratory distress and disseminated intravascular coagulation type coagulopathy, while atypical; disseminated intravascular coagulation does not occur. SARS CoV-2 infection causes coagulopathy due to the alteration of Virchow's triad and coagulation factors. We present the case of a 21-year-old pregnant woman who consulted for premature rupture of membranes, with an indication for cesarean section, and during surgery presented bradycardia, hypotension, and desaturation until cardiorespiratory arrest. An angiotomography showed amniotic fluid embolism associated with pulmonary edema, ruling out differential diagnoses associated with the disease, leaving as the only cause of the infection confirmed by COVID-19, which, it was inferred, was closely related to the immunological disorder suffered by the patient.

Aortic valve reconstruction surgery with Ozaki technique: initials results from a single center / Cirugía de reconstrucción de válvula aórtica con técnica de Ozaki: resultados iniciales en un centro de referencia

Abstract Background: Aortic valve (AV) replacement is the gold standard treatment for severe symptomatic AV disease. Recently, AV reconstruction surgery (Ozaki procedure) emerges as a surgical alternative with good results in the medium term. Methods: We retrospectively analyzed 37 patients who underwent AV reconstruction surgery between January 2018 and June 2020 in a national reference center in Lima, Peru. The median age was 62 years, interquartile range (IQR: 42-68). The main indication for surgery was AV stenosis (62.2%), in most cases due to bicuspid valve (19 patients, 51.4%). Twenty-two (59.4%) patients had another pathology with surgical indication associated to AV disease, 8 (21.6%) had dilatation of the ascending aorta with indication for replacement. Results: One in-hospital death occurred (1/38, 2.7%) due to perioperative myocardial infarction. There was a significant reduction in the medians of the peak (70 mmHg, CI 95% = 50.03-79.86 vs. 14 mmHg, CI 95% = 11.93-17.5, p < 0.0001) and mean (45.5 mmHg CI 95% = 30.6-49.68 vs. 7 mmHg, CI 95% = 5.93-9.6, p < 0.0001) AV gradients when we compared baseline characteristics with first 30-days results. In an average of 19 (± 8.9) months of follow-up, survival, reoperation-free survival for valve dysfunction, and survival free of AV insufficiency ≥ II were 97.3%, 100% and 91.9%, respectively. Significant reduction in the medians of the peak and mean AV gradients was maintained. Conclusions: AV reconstruction surgery showed optimal results in term of mortality, reoperation-free survival, and hemodynamic characteristics of the neo-AV.

Resumen Introducción: El reemplazo de la válvula aórtica es el tratamiento de elección para la valvulopatía aórtica severa sintomática. Recientemente, la cirugía de reconstrucción valvular aórtica (procedimiento de Ozaki) emerge como una alternativa quirúrgica con buenos resultados a mediano plazo. Métodos: Analizamos retrospectivamente 37 pacientes intervenidos de reconstrucción de válvula aórtica entre enero de 2018 y junio de 2020 en un centro de referencia nacional en Lima, Perú. La mediana de edad fue de 62 años (rango intercuartílico: 42-68). La estenosis de la válvula fue la principal indicación de cirugía (62.2%), en la mayoría de los casos por válvula bicúspide (19 pacientes, 51.4%). 22 (59.4%) pacientes presentaban otra patología con indicación de cirugía, 8 (21.6%) presentaban dilatación de la aorta ascendente con indicación de reemplazo. Resultados: La mortalidad intrahospitalaria fue de 1/38, 2.7%, por infarto de miocardio perioperatorio. Hubo una reducción significativa en las medianas del gradiente máximo (70 mmHg, IC 95% = 50.03-79.86 vs. 14 mmHg, IC 95% = 11.93-17.5, p < 0.0001) y gradiente medio (45.5 mmHg IC 95% = 30.6-49.68 vs. 7 mmHg, IC 95% = 5.93-9.6, p < 0.0001) de la válvula aórtica cuando comparamos las características basales con los resultados de los primeros 30 días. En una media de 19 (± 8.9) meses de seguimiento la sobrevida fue del 97.3%; la sobrevida libre de reoperación por disfunción valvular, 100% y la sobrevida libre de insuficiencia aórtica ≥ II, 91.9%, respectivamente. Se mantuvo una reducción significativa en las medianas de los gradientes máximo y medio de la válvula aórtica. Conclusiones: La cirugía de reconstrucción de válvula aórtica con pericardio autólogo mostró resultados óptimos en términos de mortalidad, supervivencia libre de reoperación y características hemodinámicas de la neo-válvula.

[Senear-Usher syndrome (seborrheic pemphigus): An exceptional case]. / Síndrome de Senear-Usher (pénfigo seborreico): un caso excepcional.

BACKGROUND: Among the autoimmune diseases causing erosive lesions and blisters on skin and mucous membranes is pemphigus. Within this is a rare subtype known as seborrheic pemphigus or Senear-usher syndrome which is characterized by broken blisters and crusts involving the seborrheic areas. CASE REPORT: A 40-year-old female patient, initially treated in a first level unit for a condition of 45 days of evolution, characterized by thick scabby lesions with an erythematous base, pruritic and painful, located in the center of the face, with posterior extension towards the abdomen, thorax, and extremities. Treatment consisted of prednisolone, with favorable evolution. The biopsy of the lesions with the diagnosis of seborrheic pemphigus. CONCLUSIONS: Senear-usher syndrome is a rare disease of multifactorial origin. Early diagnosis and adequate treatment are decisive factors to avoid the evolution and advanced forms of the disease.

ANTECEDENTES: Dentro de las enfermedades autoinmunes que provocan lesiones erosivas y ampollas en la piel y las mucosas se encuentra el pénfigo. Un subtipo raro de esta enfermedad es el pénfigo seborreico, o síndrome de Senar-Usher, caracterizado por ampollas rotas y costras que afectan las áreas corporales que secretan grasa. REPORTE DE CASO: Paciente femenina de 40 años, atendida inicialmente en una unidad de primer nivel por un cuadro de 45 días de evolución, caracterizado por lesiones costrosas gruesas de base eritematosa, pruriginosas y dolorosas, de localización centro-facial, con posterior extensión hacia el abdomen, tórax y extremidades. El tratamiento consistió en prednisolona, con evolución favorable. La biopsia de las lesiones confirmó el diagnóstico de pénfigo seborreico. CONCLUSIONES: El síndrome de Senear-Usher, o pénfigo seborreico, es una enfermedad excepcional, de origen multifactorial. El diagnóstico oportuno y tratamiento adecuado son factores decisivos para evitar la evolución de la enfermedad a formas avanzadas.

Caracterización clínica y sociodemográfica de Diabetes Mellitus en pacientes pediátricos del Hospital Regional de la Orinoquía, Yopal, Colombia

Introducción: La Diabetes Mellitus (DM) es una alteración metabólica crónica, creciente en la población pediátrica que conduce a múltiples complicaciones micro y macrovasculares. Es un problema de salud pública por los altos costos que conlleva el diagnóstico y tratamiento. Según la Federación Internacional de Diabetes (IFD), la incidencia anual en el mundo está aumentando, debido a que la prevalencia de edad entre 0-14 años es de 98.2% y de 0-19 años es de 128.9% entre el 2019 y 2021 con una incidencia de 108.3% y 149.5%, respectivamente, por 100.000 habitantes en 215 países. Objetivo: Describir las características clínicas de un grupo de niños y adolescentes que ingresaron al servicio de urgencias del Hospital Regional de la Orinoquía (HORO) de Yopal-Casanare, en el período 2019 -2020 con diagnóstico de novo o previo de diabetes mellitus. Metodología: Se realizó un estudio observacional, descriptivo y retrospectivo, tipo serie de casos, donde se incluyeron pacientes menores de 18 años con diagnóstico de novo o previo de diabetes mellitus en el período de 2019 -2020 en el Hospital Regional de la Orinoquía. Se analizaron un total de 15 pacientes. Resultados: Se muestra la clasificación de los pacientes según grupo de edades y sexo, se encuentra predominio del género masculino con un 53,3% de los 15 pacientes que cumplían con los criterios diagnósticos, mientras que la población femenina fue de 46,6%. La edad promedio de los pacientes pediátricos fue de 13 ± 13.2 Conclusiones: En el estudio realizado en el Hospital regional de la Orinoquía, la edad entre 11 - 13 años es la más frecuente para DM, con un predominio significativo del sexo masculino, provenientes de áreas urbanas. Se halló que el bajo peso es un dato alarmante, además de valores de glicemia alterados que se relacionan con las complicaciones presentadas al momento del ingreso del paciente, lo cual representa un problema de salud pública entre niños y adultos jóvenes debido a la heterogeneidad, del factor genético y ambiental.

Introduction: Diabetes mellitus (DM) is a chronic metabolic disorder that is increasing in the pediatric population and leads to multiple microvascular and macrovascular complications. It is a public health problem due to the high costs of diagnosis and treatment. According to the International Diabetes Federation (IFD) the annual incidence in the world is increasing, due to an age prevalence between 0-14 years of 98.2% and 0-19 years of 128.9% between 2019 and 2021 with an incidence of 108.3% and 149.5% respectively per 100,000 inhabitants in 215 countries. Objective: To describe the clinical characteristics of a group of children and adolescents admitted to the emergency department of the Hospital Regional de la Orinoquía (HORO) in Yopal-Casanare in the period 2019 to 2020 with de novo or previous diagnosis of diabetes mellitus. Methodology: An observational, descriptive, and retrospective study, case series type, where patients under 18 years of age with de novo or previous diagnosis of diabetes mellitus were included in the period from 2019 to 2020 in the Orinoquía Regional Hospital. Results: The classification of the patients according to age group and sex shows a predominance of the male gender with 53.3% of the 15 patients who met the diagnostic criteria, while the female population was 46.6%. The average age of the pediatric patients was 13 ± 13.2 Conclusions: The study carried out at the Hospital Regional de la Orinoquía showed that the most frequent age group was 11 to 13 years old, with a significant predominance of males, coming from urban areas. It was found that low weight is an alarming fact plus altered glycemia values are related to the complications presented at the time of the patient's admission, which represents a public health problem among children and young adults due to the heterogeneity of the genetic and environmental factors.

Rare Association of Budd-Chiari Syndrome with COVID-19: A Case Report

Introduction: Severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) is a virus that can cause respiratory infections and pose a risk to patients' lives. While it primarily affects the airways, it can also lead to extrapulmonary clinical manifestations, such as hypercoagulable states, resulting in conditions like cerebrovascular disease, acute myocardial infarction, and, in rare cases, Budd-Chiari syndrome. Clinical case: This case involves a patient who was admitted to the emergency room with dyspnea on moderate exertion, progressive functional class deterioration, lower extremity edema, cough, fever, and weakness. The patient had a history of coronavirus disease 2019 (COVID-19) infection one month prior. Abdominal CT scan revealed subacute Budd-Chiari syndrome involving the middle sub-hepatic vein, along with right ventricle thrombosis, and a positive test for SARS-CoV-2. Conclusions: Budd-Chiari syndrome has multiple causes, primarily associated with hypercoagulable states or the presence of neoplasms that disrupt liver function or obstruct hepatic venous drainage. However, the understanding of the relationship between COVID-19 hypercoagulability and Budd-Chiari syndrome is still limited. Further research is needed to explore the heterogeneity of its pathogenesis in the context of the SARS-CoV-2 pandemic.

Introducción: el coronavirus del síndrome respiratorio agudo grave de tipo 2 (SARS-CoV-2) es un virus que puede causar infecciones respiratorias y poner en riesgo la vida de los pacientes. Aunque afecta principalmente las vías respiratorias, se pueden presentar manifestaciones clínicas extrapulmonares como estados de hipercoagulabilidad, lo que causa patologías como enfermedad cerebrovascular e infarto agudo de miocardio, y en casos menos frecuentes, síndrome de Budd-Chiari. Caso clínico: se presenta el caso de una paciente que ingresó al servicio de urgencias por disnea de medianos esfuerzos, deterioro progresivo de la clase funcional y edema en extremidades inferiores asociado con tos, fiebre y adinamia. Refirió el antecedente de infección por enfermedad por coronavirus de 2019 (COVID-19) un mes antes y la tomografía de abdomen contrastada reveló síndrome de Budd-Chiari subagudo de la vena subhepática media asociada a trombosis del ventrículo derecho con prueba positiva para SARS-CoV-2. Conclusiones: El síndrome de Budd-Chiari es de origen multicausal, principalmente por estados de hipercoagulabilidad o presencia de neoplasias que ocasionan disrupción de la función del hígado o causan la ocupación de espacio sobre el drenaje venoso hepático; sin embargo, en el contexto de la pandemia de SARS CoV-2, aún se conoce muy poco la heterogeneidad de su patogénesis, como es la hipercoagulabilidad de la COVID-19 y el síndrome de Budd-Chiari, por lo que inferimos que están altamente relacionados.

Improving combination therapies: targeting A2B-adenosine receptor to modulate metabolic tumor microenvironment and immunosuppression.

BACKGROUND: We investigated the role of A2B-adenosine receptor in regulating immunosuppressive metabolic stress in the tumor microenvironment. Novel A2B-adenosine receptor antagonist PBF-1129 was tested for antitumor activity in mice and evaluated for safety and immunologic efficacy in a phase I clinical trial of patients with non-small cell lung cancer. METHODS: The antitumor efficacy of A2B-adenosine receptor antagonists and their impact on the metabolic and immune tumor microenvironment were evaluated in lung, melanoma, colon, breast, and epidermal growth factor receptor-inducible transgenic cancer models. Employing electron paramagnetic resonance, we assessed changes in tumor microenvironment metabolic parameters, including pO2, pH, and inorganic phosphate, during tumor growth and evaluated the immunologic effects of PBF-1129, including its pharmacokinetics, safety, and toxicity, in patients with non-small cell lung cancer. RESULTS: Levels of metabolic stress correlated with tumor growth, metastasis, and immunosuppression. Tumor interstitial inorganic phosphate emerged as a correlative and cumulative measure of tumor microenvironment stress and immunosuppression. A2B-adenosine receptor inhibition alleviated metabolic stress, downregulated expression of adenosine-generating ectonucleotidases, increased expression of adenosine deaminase, decreased tumor growth and metastasis, increased interferon γ production, and enhanced the efficacy of antitumor therapies following combination regimens in animal models (anti-programmed cell death 1 protein vs anti-programmed cell death 1 protein plus PBF-1129 treatment hazard ratio = 11.74 [95% confidence interval = 3.35 to 41.13], n = 10, P < .001, 2-sided F test). In patients with non-small cell lung cancer, PBF-1129 was well tolerated, with no dose-limiting toxicities; demonstrated pharmacologic efficacy; modulated the adenosine generation system; and improved antitumor immunity. CONCLUSIONS: Data identify A2B-adenosine receptor as a valuable therapeutic target to modify metabolic and immune tumor microenvironment to reduce immunosuppression, enhance the efficacy of immunotherapies, and support clinical application of PBF-1129 in combination therapies.

Endocarditis de la válvula aórtica causada por Brucella melitensis / Aortic valve endocarditis caused by Brucella melitensis

La endocarditis bacteriana secundaria a la infección por Brucella spp., en este caso B. melitensis, como complicación de la brucelosis humana tiene una incidencia baja y, aunque es la presentación clínica con la que se asocia más frecuentemente la mortalidad, no todos los casos son letales, si son tratados oportunamente. Se describe el caso clínico de una endocarditis bacteriana por B. melitensis, diagnosticada en un adulto por el aislamiento del microorganismo en el hemocultivo. Paciente del sexo masculino, de 40 años, con antecedentes de realizar partos en el ganado bovino y consumir leche no pasteurizada. Acudió al médico por presentar durante siete días de evolución de las siguientes manifestaciones clínicas: fiebre, mialgias, artralgias, tos seca y pérdida de peso (15 kg). El hemograma informa: leucopenia, trombocitopenia y anemia; mientras que en un ecocardiograma transesofágico se observó vegetación en la válvula aórtica con una disminución de la función sistólica y en el hemocultivo se aisló B. melitensis. Debido a estos antecedentes, se inició el tratamiento antibacteriano con rifampicina, doxiciclina y gentamicina. El paciente se recuperó y tuvo una evolución clínica satisfactoria. La brucelosis es una enfermedad infrecuente. Debe considerarse en toda persona con fiebre de foco desconocido que resida en zonas endémicas o esté expuesto al cuidado de animales de granja. En esta enfermedad se impone un diagnóstico y tratamiento preciso, por ser una complicación con alta letalidad.

Bacterial endocarditis, secondary to Brucella spp. infection, in this case by B. melitensis, as a complication of human brucellosis has a low incidence. Although it is the clinical presentation most frequently associated with mortality, not all cases are lethal if timely treatment is provided. We describe a clinical case of bacterial endocarditis due to B. melitensis in a 40-year-old male patient with a history of conducting cattle deliveries and consuming unpasteurized milk, diagnosed after isolating the microorganism in blood culture. He presented with the following clinical manifestations after seven days of evolution: fever, myalgias, arthralgias, dry cough and weight loss (15 kg). The hemogram revealed leukopenia, thrombocytopenia, and anemia; while a transesophageal echocardiogram showed vegetation on the aortic valve with decreased systolic function, and B. melitensis was isolated in a blood culture. Considering this medical history, antibacterial treatment was initiated with rifampicin, doxycycline and gentamicin. The patient recovered and had satisfactory clinical evolution. Brucellosis is a rare disease. It should be considered in any person with a fever of unknown origin who lives in endemic areas or is exposed to the care of farm animals. Endocarditis is a highly lethal complication of human brucellosis; therefore, it requires a precise diagnosis and treatment.

Anemia por uncinarias, una infección subestimada por el clínico / Hookworm anemia, an infection underestimated by clinician

La uncinariasis fue descrita por primera vez por Dubini en 1838. Es una helmintiasis intestinal causada por el Necator americanus y/o Ancylostoma duodenale. Frecuentemente son endémicas de áreas tropicales y subtropicales; afecta tanto a niños como a adultos. La transmisión asciende cuando existen entornos socioculturales y demográficos que favorecen la contaminación fecal, por lo que es considerado un problema de salud pública en el mundo. Se presenta el caso de un paciente masculino de 20 años que acudió a urgencias por astenia, adinamia, taquicardia y palidez mucocutánea generalizada; el hemograma reportó anemia severa y eosinofilia. Se requirió transfusión de 4 UI de glóbulos rojos y sulfato ferroso. El examen coprológico mostró infección por Necator americanus, que fue tratada con albendazol y, posteriormente, fue egresado de la institución sanitaria. La infección por uncinarias constituye una causa olvidada para el clínico de hemorragia de las vías digestivas y desarrollo de anemia. Por tanto, el presente estudio destaca que esta parasitosis es una causa importante en el diagnóstico diferencial. Además, se ofrece mayor importancia a las estrategias preventivas como la capacitación a profesionales de salud, el refuerzo de técnicas de aseo, la disminución de la contaminación y el aumento de la higiene personal(AU)

Hookworm infection was first described by Dubini in 1838. It is an intestinal helminth infection caused by Necator americanus and/or Ancylostoma duodenale. They are frequently endemic to tropical and subtropical areas and affect both children and adults. Transmission increases when there are socio-cultural and demographic environments that favor fecal contamination; therefore, it is a public health problem worldwide. We describe the case of a 20-year-old male patient who presented to the emergency department with asthenia, adynamia, tachycardia, and generalized mucocutaneous pallor. The blood test showed severe anemia and eosinophilia. Transfusion of 4 IU of red blood cells and ferrous sulphate was required. The coprological test showed infection by Necator americanus, which was treated with albendazole. Afterwards, the patient was discharged from the health institution. Hookworm infection is a neglected cause of gastrointestinal bleeding and anemia by the clinician. Therefore, the present study highlights this parasitosis as an important cause in the differential diagnosis. In addition, greater importance is given to preventive strategies such as training the health professionals, reinforcement of hygiene techniques, decrease of contamination and increase of proper personal hygiene(AU)

Effectiveness of a Mobile App to Increase Risk Perception of Tobacco, Alcohol, and Marijuana Use in Mexican High School Students: Quantitative Study.

BACKGROUND: Young people have the highest rate of drug use worldwide. Recent data from Mexico in this population show that the prevalence of illicit drug use doubled between 2011 and 2016 (2.9%-6.2%), with marijuana being the one with the highest increase (2.4%-5.3%), but also point out that alcohol and tobacco use have remained steady or decreased. Mexican adolescents are at high risk for drug use owing to a low perception of risk and the availability of drugs. Adolescence is an ideal period to reduce or prevent risky behaviors using evidence-based strategies. OBJECTIVE: In this study, we aimed to test the short-term effectiveness of a mobile intervention app ("What Happens if you Go Too Far?" ["¿Qué pasa si te pasas?"]) that seeks to increase risk perception of tobacco, alcohol, and marijuana use in a sample of Mexican high school students. METHODS: A nonexperimental evaluation based on pretest-posttest design was used to measure the effectiveness of a preventive intervention using a mobile app, "What Happens If You Go Too Far?" The dimensions analyzed were knowledge of drugs and their effects, life skills, self-esteem, and risk perception. The intervention was conducted on a high school campus with 356 first-year students. RESULTS: The sample included 359 first-year high school students (mean 15, SD 0.588 years; women: 224/359, 62.4% men: 135/359, 37.6%). The intervention increased the overall risk perception of tobacco (χ24=21.6; P<.001) and alcohol use (χ24=15.3; P<.001). There was no significant difference in the perception that it is dangerous to smoke 5 cigarettes, and there was a marginal difference in the perception that it is very dangerous to smoke 1 cigarette or to use alcohol or marijuana. We used a generalized estimating equation method to determine the impact of the variables on risk perception. The results showed that knowledge about smoking increased the risk perception of smoking 1 cigarette (odds ratio [OR] 1.1065, 95% CI 1.013-1.120; P=.01), and that knowledge about marijuana use (OR 1.109, 95% CI 1.138-1.185; P=.002) and self-esteem (OR 1.102, 95% CI 1.007-1.206; P=.04) produced significant increases in the risk perception of consuming 5 cigarettes. Resistance to peer pressure and assertiveness also increased the perceived risk of using tobacco and alcohol. CONCLUSIONS: The intervention has the potential to increase the perception of risk toward drug use in high school students by providing knowledge about the effects and psychosocial risks of drug use and by strengthening life skills that are associated with increased risk perception. The use of mobile technologies in intervention processes may broaden the scope of preventive work for adolescents.

[Aortic valve reconstruction surgery with Ozaki technique: initials results from a single center]. / Cirugía de reconstrucción de válvula aórtica con técnica de Ozaki: resultados iniciales en un centro de referencia.

Background: Aortic valve (AV) replacement is the gold standard treatment for severe symptomatic AV disease. Recently, AV reconstruction surgery (Ozaki procedure) emerges as a surgical alternative with good results in the medium term. Methods: We retrospectively analyzed 37 patients who underwent AV reconstruction surgery between January 2018 and June 2020 in a national reference center in Lima, Peru. The median age was 62 years, interquartile range (IQR: 42-68). The main indication for surgery was AV stenosis (62.2%), in most cases due to bicuspid valve (19 patients, 51.4%). Twenty-two (59.4%) patients had another pathology with surgical indication associated to AV disease, 8 (21.6%) had dilatation of the ascending aorta with indication for replacement. Results: One in-hospital death occurred (1/38, 2.7%) due to perioperative myocardial infarction. There was a significant reduction in the medians of the peak (70 mmHg, CI 95% = 50.03-79.86 vs. 14 mmHg, CI 95% = 11.93-17.5, p < 0.0001) and mean (45.5 mmHg CI 95% = 30.6-49.68 vs. 7 mmHg, CI 95% = 5.93-9.6, p < 0.0001) AV gradients when we compared baseline characteristics with first 30-days results. In an average of 19 (± 8.9) months of follow-up, survival, reoperation-free survival for valve dysfunction, and survival free of AV insufficiency ≥ II were 97.3%, 100% and 91.9%, respectively. Significant reduction in the medians of the peak and mean AV gradients was maintained. Conclusions: AV reconstruction surgery showed optimal results in term of mortality, reoperation-free survival, and hemodynamic characteristics of the neo-AV.

Introducción: El reemplazo de la válvula aórtica es el tratamiento de elección para la valvulopatía aórtica severa sintomática. Recientemente, la cirugía de reconstrucción valvular aórtica (procedimiento de Ozaki) emerge como una alternativa quirúrgica con buenos resultados a mediano plazo. Métodos: Analizamos retrospectivamente 37 pacientes intervenidos de reconstrucción de válvula aórtica entre enero de 2018 y junio de 2020 en un centro de referencia nacional en Lima, Perú. La mediana de edad fue de 62 años (rango intercuartílico: 42-68). La estenosis de la válvula fue la principal indicación de cirugía (62.2%), en la mayoría de los casos por válvula bicúspide (19 pacientes, 51.4%). 22 (59.4%) pacientes presentaban otra patología con indicación de cirugía, 8 (21.6%) presentaban dilatación de la aorta ascendente con indicación de reemplazo. Resultados: La mortalidad intrahospitalaria fue de 1/38, 2.7%, por infarto de miocardio perioperatorio. Hubo una reducción significativa en las medianas del gradiente máximo (70 mmHg, IC 95% = 50.03-79.86 vs. 14 mmHg, IC 95% = 11.93-17.5, p < 0.0001) y gradiente medio (45.5 mmHg IC 95% = 30.6-49.68 vs. 7 mmHg, IC 95% = 5.93-9.6, p < 0.0001) de la válvula aórtica cuando comparamos las características basales con los resultados de los primeros 30 días. En una media de 19 (± 8.9) meses de seguimiento la sobrevida fue del 97.3%; la sobrevida libre de reoperación por disfunción valvular, 100% y la sobrevida libre de insuficiencia aórtica ≥ II, 91.9%, respectivamente. Se mantuvo una reducción significativa en las medianas de los gradientes máximo y medio de la válvula aórtica. Conclusiones: La cirugía de reconstrucción de válvula aórtica con pericardio autólogo mostró resultados óptimos en términos de mortalidad, supervivencia libre de reoperación y características hemodinámicas de la neo-válvula.

Evaluation of Clinical and Biomechanical Features of Scars Resulting from the Treatment of Burn Contractures Comparing Acellular Dermal Matrices: A Randomized Clinical Trial.

OBJECTIVE: The aim of this study was to compare clinical and biomechanical features of scars resulting from the treatment of burn contractures using different acellular dermal matrices (ADM). SUMMARY BACKGROUND DATA: Extensive burns often lead to severe sequelae, such as skin contractures, that can be treated using ADM to improve the quality of these scars. METHODS: A prospective, randomized and controlled clinical trial was performed including patients with burn contractures at least 1-year post-burn, treated using split-thickness skin graft (STSG). These patients were randomized into 4 groups: control (received only STSG without ADM), Integra (ADM + STSG), Matriderm (ADM + STSG), and Pelnac (ADM + STSG). Exclusion criteria were loss of follow-up and graft integration failure. The evaluation was performed using the Vancouver Scar Scale (VSS), the durom-eter, and the cutometer in areas of normal skin, hypertrophic scar, and surgical scar, at least 1 year after the surgery. RESULTS: In the VSS, durometer, and cutometer evaluation, there was no difference in the comparison of surgical scars among groups. Analyzing each group, with an intraindividual evaluation comparing areas of normal skin with surgical scars, the results suggested a possibility of a surgical scar hardness closer to normal skin for Integra and Matriderm groups measured with the durometer. In the cutometer evaluation, surgical scars were not comparable to areas of normal skin. CONCLUSIONS: This study suggests that there is no difference in the quality of scar assessed through the analysis of clinical and biomechanical features comparing acellular dermal matrices (Integra, Matriderm, and Pelnac) and only split-thickness skin graft without a dermal matrix.

Aneurisma aórtico e insuficiencia valvular severa por sífilis terciaria en paciente joven, una enfermedad desatendida / Aortic aneurysm and severe valvular insufficiency due to tertiary syphilis in a young patient, a neglected disease / Aneurisma da aorta e insuficiência valvular grave devido à sífilis terciária em um paciente jovem, uma doença negligenciada

La sífilis es causada por Treponema pallidum, es reconocida por la variedad de sus manifestaciones clínicas; compromete el sistema nervioso, tegumentario y cardiovascular. Las alteraciones cardiovasculares ocurren en 70% de los casos con sífilis no tratada, el 71% de las aortitis sifilíticas desarrollan aneurismas aórticos y la complicación más frecuente es la insuficiencia aórtica. El tratamiento va dirigido a la enfermedad subyacente, con manejo antibiótico para la sífilis terciaria y las complicaciones tromboembólicas y si requiere reparación quirúrgica. Presentamos un caso poco frecuente de un paciente diagnosticado de infección por el virus de la inmunodeficiencia humana y complicaciones cardiovasculares típicas de la sífilis terciaria, que precisó tratamiento médico y quirúrgico, que fue exitoso. Destacamos la pericia clínica de los profesionales de nuestra institución para diagnosticar e identificar las complicaciones cardiovasculares de la sífilis terciaria.

Syphilis is caused by Treponema pallidum and is recognized by the variety of its clinical manifestations; it involves the nervous, integumentary and cardiovascular systems. Cardiovascular alterations occur in 70% of cases with untreated syphilis, 71% of syphilitic aortitis develop aortic aneurysms and the most frequent complication is aortic insufficiency. Treatment is directed at the underlying disease, with antibiotic treatment for tertiary syphilis and thromboembolic complications and if necessary surgical repair. We present a rare case of a patient diagnosed with human immunodeficiency virus infection and cardiovascular complications typical of tertiary syphilis, who required medical and surgical treatment, which was successful. We highlight the clinical experience of our institution's professionals in the diagnosis and identification of cardiovascular complications of tertiary syphilis.

A sífilis é causada pelo Treponema pallidum e é reconhecida pela variedade de suas manifestações clínicas; ela afeta os sistemas nervoso, tegumentar e cardiovascular. As alterações cardiovasculares ocorrem em 70% dos casos de sífilis não tratada, 71% dos casos de aortite sifilítica desenvolvem aneurismas aórticos e a complicação mais frequente é a insuficiência aórtica. O tratamento é direcionado para a doença subjacente, com tratamento antibiótico para sífilis terciária e complicações tromboembólicas e, se necessário, reparo cirúrgico. Apresentamos um caso raro de um paciente diagnosticado com infecção pelo vírus da imunodeficiência humana e complicações cardiovasculares típicas da sífilis terciária, que precisou de tratamento médico e cirúrgico, que foi bem-sucedido. Apresentamos um caso raro de um paciente com diagnóstico de infecção pelo vírus da imunodeficiência humana e complicações cardiovasculares típicas da sífilis terciária, que necessitou de tratamento médico e cirúrgico, o qual foi bem-sucedido. Destacamos a experiência clínica dos profissionais de nossa instituição no diagnóstico e na identificação das complicações cardiovasculares da sífilis terciária.

Gozo, segregação e trauma na civilização neoliberal / Enjoyment, segregation, and trauma in the neoliberal civilization / Jouissance, ségrégation et traumatisme dans la civilisation néolibérale

O real, em Lacan, aparece como um resto que escapa inevitavelmente à ordem simbólica e tem um efeito traumático. O sintoma responde ao traumático preservando algo dele, mas ao mesmo tempo o disfarçando. Para isso, ele alia-se à fantasia, na qual o gozo que assinala a irrupção do traumático é projetado no Outro. Na sociedade repressiva da época de Freud, sintoma e fantasia forneciam ao sujeito uma válvula de escape que velava o trauma estrutural. Na sociedade neoliberal contemporânea, o imperativo do gozo torna isso mais difícil e o trauma estrutural mostra-se de maneira mais evidente. Além disso, a segregação em termos de tipo de gozo ou de possibilidade de acesso ao gozo reforça o elemento traumático. O establishment psiquiátrico, contudo, tende a desresponsabilizar o sujeito (e a sociedade na qual ele vive) pelo trauma.

The real, in Lacan, appears as a rest that inevitably escapes the symbolic order and has a traumatic effect. The symptom responds to the trauma by preserving something from it while disguising it. For that, it articulates itself to fantasy, in which the enjoyment that marks the irruption of the trauma is projected onto the Other. In the repressive society of the times of Freud, symptom and fantasy provided the subject with an escape valve that veiled the structural trauma. In contemporary neoliberal society, the imperative of enjoyment hinders this mechanism, thus the structural trauma appears more evidently. Moreover, segregation in terms of the type of enjoyment or the possibility of access to enjoyment reinforces the traumatic element. The psychiatric establishment, however, tends to exempt the subject (and the society where he lives) from responsibility for the trauma.

Le réel, chez Lacan, apparaît comme un reste qui échappe inévitablement à l'ordre symbolique et a un effet traumatique. Le symptôme répond au traumatisme en en préservant quelque chose, mais en le masquant en même temps. Pour cela, il s'allie au fantasme, dans lequel la jouissance qui marque l'irruption du traumatique est projetée sur l'Autre. Dans la société répressive du temps de Freud, le symptôme et le fantasme fournissaient au sujet un exutoire qui voilait le traumatisme structurel. Dans la société néolibérale contemporaine, l'impératif de jouissance rend cela plus difficile et le traumatisme structurel apparaît plus clairement. De plus, la ségrégation en termes de type de jouissance ou de possibilité d'accès à la jouissance renforce l'élément traumatique. L'établissement psychiatrique a cependant la tendance à exonérer le sujet (et la société dans laquelle il vit) de la responsabilité du traumatisme.

Polar mutagenesis of polycistronic bacterial transcriptional units using Cas12a.

BACKGROUND: Functionally related genes in bacteria are often organized and transcribed as polycistronic transcriptional units. Examples are the fim operon, which codes for biogenesis of type 1 fimbriae in Escherichia coli, and the atp operon, which codes for the FoF1 ATP synthase. We tested the hypothesis that markerless polar mutations could be efficiently engineered using CRISPR/Cas12a in these loci. RESULTS: Cas12a-mediated engineering of a terminator sequence inside the fimA gene occurred with efficiencies between 10 and 80% and depended on the terminator's sequence, whilst other types of mutations, such as a 97 bp deletion, occurred with 100% efficiency. Polar mutations using a terminator sequence were also engineered in the atp locus, which induced its transcriptional shutdown and produced identical phenotypes as a deletion of the whole atp locus (ΔatpIBEFHAGDC). Measuring the expression levels in the fim and atp loci showed that many supposedly non-polar mutants induced a significant polar effect on downstream genes. Finally, we also showed that transcriptional shutdown or deletion of the atp locus induces elevated levels of intracellular ATP during the exponential growth phase. CONCLUSIONS: We conclude that Cas12a-mediated mutagenesis is an efficient simple system to generate polar mutants in E. coli. Different mutations were induced with varying degrees of efficiency, and we confirmed that all these mutations abolished the functions encoded in the fim and atp loci. We also conclude that it is difficult to predict which mutagenesis strategy will induce a polar effect in genes downstream of the mutation site. Furthermore the strategies described here can be used to manipulate the metabolism of E. coli as showcased by the increase in intracellular ATP in the markerless ΔatpIBEFHAGDC mutant.

Causas asociadas a mortalidad por epoc en el Hospital Clínico Quirúrgico Docente "Dr. Salvador Allende"

RESUMEN Introducción: La enfermedad pulmonar obstructiva crónica (epoc) es una entidad inflamatoria crónica caracterizada por una limitación, parcialmente reversible, del flujo aéreo. Su principal factor de riesgo es el tabaquismo y existen múltiples factores asociados a su elevada letalidad. Objetivo: Identificar los factores asociados con la muerte en pacientes con epoc pertenecientes al Hospital Clínico Quirúrgico Docente "Dr. Salvador Allende", La Habana, Cuba, en el periodo comprendido desde el 1 de enero al 31 de diciembre de 2019. Método: Se realizó un estudio epidemiológico observacional analítico de casos y controles. Los casos fueron los fallecimientos (n=34) con diagnóstico de epoc y los controles fueron los pacientes vivos (n=59) con este diagnóstico confirmado al egreso. Fueron consideradas las variables: edad, sexo, tabaquismo, hipertensión arterial, diabetes mellitus, cor pulmonale crónico, cáncer, grado de epoc, causa de hospitalización, sitio de hospitalización y necesidad de ventilación mecánica invasiva. Se emplearon métodos estadísticos descriptivos, análisis univariado y multivariado para calcular el riesgo, y la regresión logística para valorar los factores de confusión. Resultados: Hubo predominio de pacientes con edad superior a los 65 años y del sexo femenino. Las variables asociadas con la muerte por epoc fueron: comorbilidad por cáncer (OR: 5,1; IC 95 %: 1,2-22,4; p=0,032) y necesidad de ventilación mecánica invasiva (OR: 6,5; IC 95 %: 1,1-38,3; p=0,04). Conclusiones: La comorbilidad por cáncer y la necesidad de ventilación mecánica invasiva se comportaron como factores de riesgo para la mortalidad en pacientes con epoc.

ABSTRACT Introduction: Chronic obstructive pulmonary disease (COPD) is a chronic inflammatory entity characterized by a partially reversible limitation of airflow. Its main risk factor is smoking and there are multiple factors associated with its high mortality. Objective: To identify the factors associated with death in COPD patients belonging to the Hospital Clínico Quirúrgico Docente "Dr. Salvador Allende", in the period from January 1 to December 31, 2019. Method: An analytical observational epidemiological study of cases and controls was carried out. The cases were deaths (n=34) with a diagnosis of COPD, and the controls were living patients (n=59) with this diagnosis confirmed at discharge. Demographic and clinical variables were considered. The variables were considered: age, sex, smoking, arterial hypertension, diabetes mellitus, chronic cor pulmonale, cancer, degree of COPD, cause of hospitalization, site of hospitalization and need for invasive mechanical ventilation. Descriptive statistical methods, univariate and multivariate analysis were used to calculate risk, and logistic regression to assess confounding factors. Results: There was a predominance of patients over 65 years of age, and females. The variables associated with death from COPD were: cancer comorbidity (OR: 5.1; 95% CI: 1.2-22.4; p=0.032) and need for invasive mechanical ventilation (OR: 6.5; CI 95%: 1.1-38.3; p=0.04). Conclusions: Cancer comorbidity and the need for invasive mechanical ventilation behaved as risk factors for mortality in patients with COPD.

RESUMO Introdução: A doença pulmonar obstrutiva crônica (DPOC) é uma entidade inflamatória crônica caracterizada por uma limitação parcialmente reversível do fluxo aéreo. Seu principal fator de risco é o tabagismo e existem múltiplos fatores associados à sua alta letalidade. Objetivo: Identificar os fatores associados ao óbito em pacientes com DPOC pertencentes ao grupo "Dr. Salvador Allende", Havana, Cuba, no período de 1º de janeiro a 31 de dezembro de 2019. Método: Foi realizado um estudo epidemiológico observacional analítico de casos e controles. Os casos eram óbitos (n=34) com diagnóstico de DPOC e os controles eram pacientes vivos (n=59) com esse diagnóstico confirmado na alta. Foram consideradas as variáveis: idade, sexo, tabagismo, hipertensão arterial, diabetes mellitus, cor pulmonale crônico, câncer, grau da DPOC, causa da internação, local da internação e necessidade de ventilação mecânica invasiva. Métodos estatísticos descritivos, análise univariada e multivariada foram usados para calcular o risco e regressão logística para avaliar os fatores de confusão. Resultados: Houve predomínio de pacientes com mais de 65 anos e do sexo feminino. As variáveis associadas ao óbito por DPOC foram: comorbidade por câncer (OR: 5,1; IC 95%: 1,2-22,4; p=0,032) e necessidade de ventilação mecânica invasiva (OR: 6,5; IC 95%: 1,1-38,3; p=0,04). Conclusões: A comorbidade oncológica e a necessidade de ventilação mecânica invasiva se comportaram como fatores de risco para mortalidade em pacientes com DPOC.

Phase I Study of Taminadenant (PBF509/NIR178), an Adenosine 2A Receptor Antagonist, with or without Spartalizumab (PDR001), in Patients with Advanced Non-Small Cell Lung Cancer.

PURPOSE: The adenosine 2A receptor (A2AR) mediates the immunosuppressive effects of adenosine in the tumor microenvironment and is highly expressed in non-small cell lung cancer (NSCLC). Taminadenant (PBF509/NIR178) is an A2AR antagonist able to reactivate the antitumor immune response. PATIENTS AND METHODS: In this phase I/Ib, dose-escalation/expansion study, patients with advanced/metastatic NSCLC and ≥1 prior therapy received taminadenant (80-640 mg, orally, twice a day) with or without spartalizumab (anti-programmed cell death-1, 400 mg, i.v., every 4 weeks). Primary endpoints were safety, tolerability, and feasibility of the combination. RESULTS: During dose escalation, 25 patients each received taminadenant alone or with spartalizumab; 19 (76.0%) and 9 (36.0%) had received prior immunotherapy, respectively. Dose-limiting toxicities (all Grade 3) with taminadenant alone were alanine/aspartate aminotransferase increase and nausea [n = 1 (4.0%) each; 640 mg], and in the combination group were pneumonitis [n = 2 (8.0%); 160 and 240 mg] and fatigue and alanine/aspartate aminotransferase increase [n = 1 (4.0%) each; 320 mg]; pneumonitis cases responded to steroids rapidly and successfully. Complete and partial responses were observed in one patient each in the single-agent and combination groups; both were immunotherapy naïve. In the single-agent and combination groups, 7 and 14 patients experienced stable disease; 7 and 6 patients were immunotherapy pretreated, respectively. CONCLUSIONS: Taminadenant, with and without spartalizumab, was well tolerated in patients with advanced NSCLC. The maximum tolerated dose of taminadenant alone was 480 mg twice a day, and 240 mg twice a day plus spartalizumab. Efficacy was neither a primary or secondary endpoint; however, some clinical benefit was noted regardless of prior immunotherapy or programmed cell death ligand-1 status.

Heart transplantation at the Peruvian National Heart Institute: One-decade single-center experience.

BACKGROUND: Heart transplantations are ideal for most patients with end-stage heart failure refractory to medical treatment. The transplantation program at the Peruvian National Heart Institute started with a 10-year continuity in 2010. OBJECTIVE: To compare our 10-year heart transplantation experience results with international standards and reflect on our Transplant Program. METHODS: We studied 83 patients who underwent orthotopic heart transplantation at a single center between January 2010 and December 2019. The recipients' profiles and survival rates were analyzed according to sex and age group, ensuring the information's confidentiality. RESULTS: The recipients' mean age was 41.2 ± 17 years, 88% were adults, and 68.7% were male. The main indications for transplantation were idiopathic dilated cardiomyopathy. 85.5% of recipients were clinically categorized as INTERMACS profiles 1-3 before transplantation. There was a significant difference between sexes regarding the preoperative left ventricular ejection fraction and between age groups regarding the waiting time. The average ischemia time was 3.1 h, operating time was 6.1 h, cardiopulmonary bypass time was 3 h, and aortic cross-clamp time was 1.7 h. The principal early postoperative complications were hematological disorders and acute kidney failure. The principal late ones were kidney failure and severe anemia. The postoperative mortality was 15.9%, and the principal causes were infection and then acute rejection. The survival at 1, 5, and 10 years was 87.5%, 79.8%, and 79.8%, respectively. The survival results were not influenced by sex or age group. CONCLUSION: Our patients' postoperative complications, mortality, and survival rates coincided with those reported by the ISHLT registry.

Evaluation of contraction of the split-thickness skin graft using three dermal matrices in the treatment of burn contractures: A randomised clinical trial.

Burn injuries commonly result in serious sequelae (such as skin contractures) in surviving patients, for which no single optimal solution is known. The goal of this study was to compare the late contraction of autologous skin grafts with or without dermal matrices used in the treatment of patients with burn contractures. This parallel design prospective, randomised and controlled clinical trial included patients with burn contracture treated using autologous skin grafts and dermal matrix. Patients were randomly assigned to one of the four groups: Integra® matrix (n = 10), Pelnac® matrix (n = 10), Matriderm® matrix (n = 9) or a Control Group (n = 10, without dermal matrix, only skin graft). The boundaries of skin defect were marked and transferred to a flat sterile surface for area measurement. The current area of the skin grafts was measured during surgery and compared with those obtained at 1, 3, 6 and 12 months postoperatively. Twelve months after surgery, the Control Group presented lower rates of skin graft contraction than Integra® (p < 0.01), Matriderm® (p = 0.01) and Pelnac® (p < 0.01) groups. Pelnac® resulted in larger skin graft contraction than Matriderm® (p < 0.01) and Integra® (p = 0.02), while differences between Integra® and Matriderm® were not significant (p = 0.16). The comparison between intraoperative and 12 months after surgery showed that the worst mean rates of skin graft contraction were from the Pelnac® (51.79%) and Matriderm® (59.17%). In patients with burn contractures, the use of these three dermal matrices did not reduce or avoid the occurrence of late contraction of the skin graft, so their use for this purpose should be carefully evaluated.

Aortic valve replacement through minithoracotomy. Results from the Peruvian experience.

Objectives: To assess mortality, major valve-related events (MAVRE), and other complications in the perioperative period and follow up in patients with aortic valve replacement (AVR) through mini-thoracotomy (MT). Methods: We retrospectively analyzed patients aged <80 who underwent AVR through MT between January 2017 and December 2021 in a national reference center in Lima, Peru. Patients undergoing other surgical approaches (mini-sternotomy, etc.), other concomitant cardiac procedures, redo, and emergency surgeries were excluded. We measured the variables (MAVRE, mortality, and other clinical variables) at 30 days and a mean follow-up of 12 months. Results: Fifty-four patients were studied, the median age was 69.5 years, and 65% were women. Aortic valve (AV) stenosis was the main indication for surgery (65%), and bicuspid AV represented 55.6% of cases. At 30-days, MAVRE occurred in two patients (3.7%), with no in-hospital mortality. One patient had an intraoperative ischemic stroke, and one required a permanent pacemaker. No patient underwent reoperation due to prosthesis dysfunction or endocarditis. In a mean follow-up of one year, MAVRE occurrence did not show variations with the perioperative period, most patients remained in NYHA I (90.7%) or II (7.4%) compared to the preoperative period (p<0.001). Conclusions: AV replacement through MT is a safe procedure in our center for patients under 80 years.

Objetivos: Evaluar la mortalidad, los eventos mayores relacionados con la válvula (EMRV) y otras complicaciones en el período perioperatorio y de seguimiento en pacientes con sustitución de la válvula aórtica (SVA) mediante minitoracotomía (MT). Métodos: Analizamos retrospectivamente a pacientes menores de 80 años, a quienes se les realizó SVA por MT entre enero de 2017 y diciembre de 2021 en un centro de referencia nacional en Lima, Perú. Se excluyeron pacientes sometidos a otros abordajes quirúrgicos (miniesternotomía, etc.), otros procedimientos cardíacos concomitantes, cirugías de reoperación y de emergencia. Medimos las variables (mortalidad, EMRV y otras variables clínicas) a los 30 días y un seguimiento medio de 12 meses. Resultados: Se estudiaron 54 pacientes, la mediana de edad fue de 69,5 años y el 65% fueron mujeres. La estenosis de la válvula aórtica (VA) fue la principal indicación para la cirugía (65%) y la VA bicúspide representó el 55,6% de los casos. A los 30 días, se produjeron dos EMRV (3,7%) y no hubo mortalidad intrahospitalaria. Un paciente tuvo un accidente cerebrovascular isquémico intraoperatorio y uno requirió un marcapasos permanente. Ningún paciente fue reoperado por disfunción de la prótesis o endocarditis. En un seguimiento medio de un año, la aparición de EMRV no mostró variaciones con el periodo perioperatorio; la mayoría de los pacientes permaneció en clase funcional NYHA I (90,7%) o II (7,4%) en comparación con el periodo preoperatorio (p<0,001). Conclusiones: La sustitución de la válvula aórtica mediante minitoracotomía es un procedimiento seguro en nuestro centro en pacientes<80 años.