Tetracycline Antibiotics Induce Host-Dependent Disease Tolerance to Infection.

Several classes of antibiotics have long been known to have beneficial effects that cannot be explained strictly on the basis of their capacity to control the infectious agent. Here, we report that tetracycline antibiotics, which target the mitoribosome, protected against sepsis without affecting the pathogen load. Mechanistically, we found that mitochondrial inhibition of protein synthesis perturbed the electron transport chain (ETC) decreasing tissue damage in the lung and increasing fatty acid oxidation and glucocorticoid sensitivity in the liver. Using a liver-specific partial and acute deletion of Crif1, a critical mitoribosomal component for protein synthesis, we found that mice were protected against sepsis, an observation that was phenocopied by the transient inhibition of complex I of the ETC by phenformin. Together, we demonstrate that mitoribosome-targeting antibiotics are beneficial beyond their antibacterial activity and that mitochondrial protein synthesis inhibition leading to ETC perturbation is a mechanism for the induction of disease tolerance.

CXCL5-mediated recruitment of neutrophils into the peritoneal cavity of Gdf15-deficient mice protects against abdominal sepsis.

Sepsis is a life-threatening organ dysfunction condition caused by a dysregulated host response to an infection. Here we report that the circulating levels of growth and differentiation factor-15 (GDF15) are strongly increased in septic shock patients and correlate with mortality. In mice, we find that peptidoglycan is a potent ligand that signals through the TLR2-Myd88 axis for the secretion of GDF15, and that Gdf15-deficient mice are protected against abdominal sepsis due to increased chemokine CXC ligand 5 (CXCL5)-mediated recruitment of neutrophils into the peritoneum, leading to better local bacterial control. Our results identify GDF15 as a potential target to improve sepsis treatment. Its inhibition should increase neutrophil recruitment to the site of infection and consequently lead to better pathogen control and clearance.

Sutureless bioprosthesis for aortic valve replacement: Surgical and clinical outcomes.

BACKGROUND: Aortic valve stenosis is the most common adult valve disease in industrialized countries. The aging population and the increase in comorbidities urge the development of safer alternatives to the current surgical treatment. Sutureless bioprosthesis has shown promising results, especially in complex procedures and in patients requiring concomitant surgeries. OBJECTIVES: Assess the clinical and hemodynamic performance, safety, and durability of the Perceval® prosthetic valve. METHODS: This single-center retrospective longitudinal cohort study collected data from all adult patients with aortic valve disease who underwent aortic valve replacement with a Perceval® prosthetic valve between February 2015 and October 2020. Of the 196 patients included (mean age 77.20 ± 5.08 years; 45.4% female; mean EuroSCORE II 2.91 ± 2.20%), the majority had aortic stenosis. RESULTS: Overall mean cross-clamp and cardiopulmonary bypass times were 33.31 ± 14.09 min and 45.55 ± 19.04 min, respectively. Mean intensive care unit and hospital stay were 3.32 ± 3.24 days and 7.70 ± 5.82 days, respectively. Procedural success was 98.99%, as two explants occurred. Four valves were reimplanted due to intraoperative misplacement. Mean transvalvular gradients were 7.82 ± 3.62 mmHg. Pacemaker implantation occurred in 12.8% of patients, new-onset atrial fibrillation in 21.9% and renal replacement support was necessary for 3.1%. Early mortality was 2.0%. We report no structural valve deterioration, strokes, or endocarditis, and one successfully treated valve thrombosis. CONCLUSIONS: Our study confirms the excellent clinical and hemodynamic performance and safety of a truly sutureless aortic valve, up to a 5-year follow-up. These results were consistent in isolated and concomitant interventions, solidifying this device as a viable option for the treatment of isolated aortic valve disease.

Age Is Not Just A Number For A Rapid Deployment Valve In Octogenarians.

INTRODUCTION: Aortic valve stenosis (AS) is the most common valvular pathology in the elderly and surgery (AVR) remains the gold-standard. However, transcatheter aortic valve replacement (TAVI) has become an emerging alternative to surgery. In a recent survey from the European Society of Cardiology, 9,4% stated that age was the main reason to propose for TAVI. METHODS: Single-center retrospective study including 353 patients (149 ≥80 years-old;204 with 60-69 years-old) submitted to AVR between 2013-2016. Primary endpoint was survival. Secondary outcomes included the rate of post- -operative complications. Long-term survival was determined by Kaplan-Meier survival analysis. Continuous variables were analyzed with t-test and linear regression and categorical variables with chi-square or Fisher. RESULTS: clinical characteristics were similar between the two groups. Both had similar survival at 30 days, 12 (93,29% 60-69yo vs 91,47% ≥80yo) and 24 months (88,34% 60-69yo vs 86,11% ≥80yo). However, rapid deployment valves (RD) had better survival rates in elderly patients. Cross-clamp time was lower in ≥80yo group, with higher percentage of RD valves (20,1% vs 4.9% in 60-69yo). The rate of post-operative atrial fibrillation was higher in >80yo group (29,06% vs. 17,28%,p=0,0147). In all patients, cross-clamp time was directly related to ventilation time(p=0,025) and chest drainage(p=0,0015). CONCLUSION: AVR after 80yo is safe. Cross-clamp time is directly correlated with ventilation time and bleeding, with a stronger correlation in patients over 80yo. RD valves reduce cross-clamp times, so their use in elderly may improve surgery outcome. Prospective studies are needed to evaluate if age may be clinical criteria for a RD.

Platelet Count Drop After Rapid Deployment Aortic Valve Implantation.

BACKGROUND: A transient postoperative drop in platelet count is an expected finding after aortic valve replacement using extracorporeal circulation. The implantation of the Perceval valve has been associated with a more intense drop of platelet count compared to other bio-prostheses. This study analyses and compares the platelets progression associated with the Perceval and Intuity valves. METHODS: The data was collected retrospectively for patients submitted to isolated aortic valve replacement with the Perceval valve (80 patients) and the Intuity valve (141 patients) in our institution between March 2014 and December 2018. The groups were further divided into those who receive platelet transfusion and those who did not. RESULTS: The minimum values of platelet count were 54% and 67% of the preoperative platelet count in the patients treated with a Perceval and an Intuity valves, respectively (p<0.001). In the patients transfused with platelets, the minimum values were 52% and 79% of the preoperative platelet count, respectively (p<0.01). Recovery of the count was faster in the patients treated with an Intuity valve. Abnormal bleeding and transfusion of packed red blood cells were not significantly different between groups (without platelet transfusion: p=0.71 and p=0.99, respectively; with platelet transfusion: p=0.58 and p=0.99, respectively). CONCLUSION: Compared to the Intuity valve, the Perceval valve is associated with a transient, but significant, drop in platelet count. This drop was not associated to an increased risk of bleeding. Platelet transfusion, in this setting, should be judicious and not only ruled by absolute values.

[Persistent left superior vena cava with agenesis of the right superior vena cava in a patient with complete atrioventricular block]. / Agenésia da Veia Cava Superior Direita com Persistência da Veia Cava Superior Esquerda Associada a Bloqueio Aurículo-ventricular Completo.

Persistant left superior vena cava is a rare systemic venous anomaly that can be associated with agenesis of the right superior vena cava. It is usually assymptomatic and discovered incidentally during surgery or other procedures. The authors present the case of a 72-year-old male submitted to an aortic valve replacement surgery. After sternotomy, persistant left superior vena cava and absence of the right superior vena cava were identified. The patient developed complete atrioventricular block after surgery, requiring the implantation of a definitive cardiac pacemaker through the brachiocephalic vein and coronary sinus. This case highlights and ilustrates the clinical implications of the described systemic venous anomalies, discussing the necessary management both in the perioperative and intraoperative periods.

A persistência da veia cava superior esquerda é uma alteração rara do sistema venoso, que pode ou não estar associada a agenesia da veia cava superior direita. É normalmente assintomática e diagnosticada maioritariamente durante a realização de procedimentos cirúrgicos ou não invasivos. Apresentamos um caso clínico de um homem de 72 anos, submetido a cirurgia de substituição de válvula aórtica, com diagnóstico intra-operatório de agenesia da veia cava superior direita e persistência da veia cava superior esquerda. O doente desenvolveu bloqueio aurículo-ventricular completo no período pós-operatório, com necessidade de colocação de um pacemaker definitivo pela veia braquiocefálica e através do seio coronário. Este caso pretende demonstrar as possíveis implicações clínicas com a identificação desta alteração, e as modificações necessárias da estratégia cirúrgica.

Minimal invasive cardiac mass resection, post-thoracic radiotherapy: a safe approach?

Minimal invasive cardiac surgery by right mini-thoracotomy for cardiac mass resection has emerged as an alternative to median sternotomy, for being less associated to postoperative complications and a faster recovery. Thoracic radiotherapy, widely used for cancer treatment, can result in pulmonary adhesions making it impossible to access the heart by thoracotomy. We report a case of a patient submitted to bilateral thoracic radiotherapy, with a cardiac mass in the left atrium, successfully treated by surgical resection, as well the intraoperative procedure done to make the minimally invasive approach possible.

A cirurgia cardíaca minimamente invasiva por mini-toracotomia direita para ressecção de massas cardíacas surgiu como alternativa à esternotomia mediana convencional, por se encontrar associada a menos complicações no pós-operatório e a uma recuperação mais rápida. A radioterapia torácica, muito utilizada como adjuvante no tratamento do cancro da mama, pode resultar em adesões pulmonares que tornam difícil o acesso ao coração por toracotomia. Reportamos o caso clínico de uma doente submetida a radioterapia torácica bilateral, com posterior diagnóstico de uma massa na aurícula esquerda, submetida a ressecção cirúrgica, assim como o procedimento realizado para tornar a abordagem minimamente invasiva possível.

[Minimally invasive approach vs full sternotomy for aortic valve and ascending aorta replacement: results from our center]. / Abordagem Minimamente Invasiva vs Esternotomia Total no Tratamento da Patologia Valvular Aórtica e da Aorta Ascendente: Resultados de um Centro.

BACKGROUND: Aortic valve disease is the most common valvular heart disease. Surgical aortic valve replacement remains the gold-standard of treatment. Recently, minimally invasive approaches have been developed to reduce surgical trauma and to compete with percutaneous treatment of valvular heart disease. Minimally invasive approaches are associated with reduced perioperative morbidity and mortality. METHODS: Single-center retrospective study comparing clinical data of patients submitted to surgical treatment of aortic stenosis by limited sternotomy versus conventional sternotomy between January 2014 and August 2016. RESULTS: The demographic and clinical characteristics between the two groups were similar. Median surgery time was 142.5 min by limited sternotomy vs 98.15 min by conventional sternotomy (p< 0.0001). Total surgery time was 142.5 min for limited sternotomy vs 98.15 min conventional sternotomy (p< 0.0001). Aortic cross-clamping time and cardiopulmonary bypass time were 58.58 and 72.92 min for limited sternotomy vs 37.46 and 72.92 min for conventional sternotomy (p<0.0001). There were not statistically significant differences between the two groups regarding pos-operative time of ventilation (8.05h ± 1.65 limited sternotomy vs 16.31h ± 9.67 conventional sternotomy, p=0.42) and post-operative blood loss (432cc limited sternotomy vs 539cc conventional sternotomy, p=0.14). Use of vasopressor support was higher with limited sternotomy (46% vs 27.3% conventional sternotomy, p=0.07), although it was not statistically significant. Rate of re-operation (8% limited sternotomy vs 5.5% conventional sternotomy, p=0.90), median intensive care unit length of stay (59.04h limited sternotomy vs 50.75h conventional sternotomy, p=0.47) and total hospital length of stay (6.96 days limited sternotomy vs 7.7 days sternotomy, p=0.75) had no differences between the two groups. The rate of post-operative complications was similar between the two groups. DISCUSSION: In our population there were not significant differences between the two approaches. It may be related to the early phase of the learning curve and to our good results concerning conventional sternotomy. Although surgery time, aortic cross-clamping time and cardiopulmonary bypass time were higher with limited sternotomy, it was not related to higher rates of post-operative complications. Limited sternotomy reduces surgical trauma and has cosmetic advantages. Our data encourages the minimally invasive surgery program of our Department.

gold standard. Nas últimas décadas têm sido desenvolvidas abordagens minimamente invasivas para reduzir o trauma cirúrgico e competir com as novas estratégias percutâneas. As abordagens minimamente invasivas estão associadas a menor morbilidade peri-operatória e menor mortalidade. Métodos: Estudo retrospectivo que compara os resultados do tratamento da patologia valvular aórtica e da aorta ascendente por mini-esternotomia e por esternotomia total no nosso centro entre Janeiro de 2014 e Agosto de 2016. Resultados: Os dois grupos de doentes apresentavam características demográficas e clínicas semelhantes. O tempo médio de cirurgia foi 142.5 min no grupo da mini-esternotomia e 98.15 min no grupo da esternotomia (p< 0,0001). O tempo de clampagem e de circulação extra-corporal (CEC) foi de 58.58 e 72.92 min com mini-esternotomia e 37.46 e 72.92 min com esternotomia (p<0,0001). Não houve diferenças significativas entre os dois grupos no tempo de ventilação invasiva pós- -operatória (8.05h ± 1.65 na mini-esternotomia vs 16.31h ± 9.67 esternotomia, p=0.42) e no volume drenado pelos drenos torácicos (média 432cc mini-esternotomia vs 539cc esternotomia, p=0.14). A necessidade de suporte aminérgico foi superior no grupo da mini-esternotomia (46% vs 27.3% no grupo da esternotomia, p=0.07), não sendo estatisticamente significativo. A taxa de re-operação foi semelhante nos dois grupos (8% mini-esternotomia vs 5.5% esternotomia, p=0.90). O tempo de internamento na UCI e tempo total de internamento foi semelhante estre os dois grupos, não havendo diferenças estatisticamente significativas (59.04h mini-esternotomia vs 50.75h esternotomia, p=0.47 e 6.96 dias na mini-esternotomia vs 7.7 dias na esternotomia, p=0.75). A ocorrência de complicações foi semelhante nos dois grupos. Conclusão: Na nossa amostra de doentes não houve diferenças entre os dois grupos. Tal deve-se provavelmente ao facto deste procedimento, durante o período estudado, se encontrar na fase inicial da curva de aprendizagem e aos bons resultados da abordagem por esternotomia-convencional. Apesar das diferenças nos tempos de cirurgia, CEC e clampagem da aorta, não houve diferenças na incidência de complicações. O procedimento minimamente invasivo tem vantagens estéticas e reduz o trauma cirúrgico. Estes dados servem de incentivo ao desenvolvimento da técnica cirúrgica no nosso serviço.

Minimally invasive bypass of the left anterior descending coronary artery.

INTRODUCTION: Minimally invasive revascularization of the left anterior descending coronary artery has gained popularity. Recently, the emergence of new surgical instruments and the improvement of the technique, allowed its use by routine. Its use in Heart Team allows excellent results. Our aim is to present the results of patients undergoing this technique in our center. METHODS: Retrospective study of patients submitted to minimally invasive revascularization of the left anterior descending coronary artery at our center. RESULTS: We identified 14 patients. The mean age was 67 years old. In the total of the procedures, 79% were elective and 21% urgent. The ventricular function was preserved in 86% of the patients. In the preoperative catheterization, 64% of the patients showed single disease of the anterior descending coronary artery, 29% had trunk lesions and 3 vessels and 7% had lesion of 2 vessels. The mean Euroscore II was 4.8%. The mean time of surgery was 103 minutes with a mean blood loss of 250mL. The main complications were wound dehiscence and revision of hemostasis. The mean hospitalization rate was 6.2 days. The hospital survival rate was 100%. CONCLUSION: Minimally invasive revascularization allows coronary artery bypass grafting with the best conduit. Revascularization may be total in single disease of the left anterior descending artery, or in case of multivessel disease, achieved with hibrid revascularization, with angioplasty of the remaining vessels. This technique has shown to be promising and safe, being the discussion in Heart Team of the patient candidates essential for achieving the best results.

Introdução: A revascularização minimamente invasiva da artéria descendente anterior tem ganho popularidade. Recentemente, o surgimento de novos instrumentos cirúrgicos e aperfeiçoamento da técnica, permitiu que seja utilizada por rotina. O seu uso em Heart Team permite excelentes resultados. O nosso objetivo é apresentar os resultados do nosso centro, dos doentes submetidos a esta técnica. Métodos: Estudo retrospetivo dos doentes submetidos a revascularização minimamente invasiva da artéria coronária descendente anterior, no nosso centro. Resultados: Foram identificados 14 doentes. A média de idade foi de 67 anos. Do total de procedimentos, 79% foram eletivos e 21% urgentes. A função ventricular encontrava-se conservada em 86% dos doentes. No cateterismo pré-operatório, 64% dos doentes apresentou doença única da descendente anterior, 29% lesão do tronco e 3 vasos e 7% lesão de 2 vasos. O Euroscore II médio foi de 4,8%. O tempo médio de cirurgia foi 103 minutos, com uma perda média de sangue de 250mL. As principais complicações foram deiscência da ferida operatória e revisão da hemóstase. A média de internamento foi de 6,2 dias. A taxa de sobrevida hospitalar foi 100%. Conclusão: A cirurgia minimamente invasiva permite a revascularização da artéria coronária mais importante, com o melhor conduto. A revascularização pode ser total, em doença única da descendente anterior, ou em caso de doença multivaso, conseguida com revascularização híbrida, com angioplastia dos restantes vasos. Esta técnica tem-se mostrado promissora e segura, sendo a discussão dos doentes candidatos em Heart Team, essencial para obter os melhores resultados.

Rapid Deployment Aortic Valves in Elderly Patients: Age is not just a Number.

INTRODUCTION: Aortic valve stenosis (AS) is the most common valvular pathology in the elderly. Surgical aortic valve replacement (AVR) remains the gold-standard of treatment for AS. However, emerging transcatheter aortic valve replacement (TAVR) has become an increasing alternative to surgery. In a recent survey from the European Society of Cardiology, 9,4% of the physicians stated that age was the main reason to propose for a TAVR instead of surgery. METHODS: We performed a single-center retrospective study including 353 patients (149 patients over 80 years-old, compared to 204 patients between 60-69 years-old) consecutively submitted to AVR between January 1, 2013, and December 31, 2016, to compare the results of both groups in AVR surgery and how we can improve surgery outcome in older patients. RESULTS: The demographic and clinical characteristics between the two groups were similar. There were no significant differences in survival between the two groups at 30 days (96,57% 60-69yo vs. 96,64% >80yo), 12 months (89,57% 60-69yo vs. 93,51% >80yo) and 24 months (85,92% 60-69yo vs. 87,62% >80yo). The postoperative complication rates were similar in the two groups, excluding the rate of post-operative atrial fibrillation, higher in the >80 years-old group (29,06% vs. 17,28%, p=0,0147). ICU and average hospital length of stay was similar between the two groups (p>0,05). In all patients, Euroscore II was directly correlated to intensive care unit length of stay (p=0,0044). In all patients, extracorporeal circulation and aortic cross-clamp times were directly correlated to invasive ventilation time (p=0,0254 and p=0,0101) and to post- -operative bleeding (p=0,0002 and p=0,0015). However, in the subgroup analysis, aortic cross-clamp time was directly correlated to ventilation time (p=0,0397) and to intensive care unit length of stay (p=0,0493) in the >80yo patients, but that was not verified in the 60-69yo patients (p=0,0942, p=0,3801, respectively). CONCLUSION: Survival rates are similar between the two groups, with similar post-operative complications. Post-operative atrial fibrillation and the use of blood and blood products are more common in patients over 80 years-old. In older patients, lower periods of extracorporeal circulation and aortic cross- -clamp much be achieved to reduce invasive ventilation time, post-operative bleeding and ICU and hospital length of stay, improving post-operative recovery. It has been shown that rapid deployment aortic valves reduce extracorcoporeal circulation and aortic cross-clamp times, so their use in elderly patients must improve surgery recovery and outcome.

[Video-assisted thoracic sympathectomy - the results from a center outpatient surgery program]. / Simpaticectomia torácica por vídeo-toracoscopia ­ experiência de um programa de cirurgia de ambulatório.

BACKGROUND: The outpatient surgery program from our department has started in 2014 to improve patient access to surgery and to reduce the surgical waitlist. Focused on the thoracic surgery, the most common intervention is the surgical treatment of primary hyperhidrosis by thoracic sympathectomy by video-assisted thoracoscopic surgery (VATS). It is performed according to the patient's symptoms, with section or application of surgical clips between R2-R5. MATERIALS AND METHODS: Retrospective study including all the patients submitted to thoracic sympathectomy by video- -assisted thoracoscopy surgery from our department's outpatient surgery program from January 2014 to January 2016. RESULTS: In our outpatient program we performed 198 thoracic sympathectomy by VATS. The mean age of the patients was 32,8 years old. 63,6% of the patients were females and 36.4% were males. From the 198 endoscopic thoracic sympathectomy performed, 181 (91,4%) were performed bilatellary with section between R3-R5, 12 (6,1%) were performed with the application of surgical clips in R2-R4 and 3 (1.5%) could not be performed due to the presence of pleuropulmonary adhesions. One of the patients was re-operated due to recurrent symptoms and another patients had surgery to remove the surgical clips (bilaterally in R2) due to exaggerated abdominal compensatory hyperhidrosis. Three patients had pneumothorax. CONCLUSION: The surgical treatment of primary hyperhidrosis was the most frequent procedure in our outpatient surgery program. The procedure without the use of a thoracic drainage allowed its inclusion in the outpatient surgery program. Excluding 3 patients, all the patients were discharged within 12 hours after the surgery. The good results and the reduction of the surgical waitlist encourage the cardiothoracic outpatient surgery program.

Introdução: O programa de cirurgia de ambulatório do Serviço de Cirurgia Cardiotorácica do HSM-CHLN iniciou-se em Janeiro de 2014, com o intuito de melhorar a acessibilidade dos pacientes e reduzir a lista de espera. Focada essencialmente na área da Cirurgia Torácica, a actividade de ambulatório assenta sobretudo no tratamento cirúrgico videoassistido (VATS) da hiperhidrose primária axilar e palmar. A correção da hiperhidrose axilar e palmar através da simpaticectomia torácica é realizada de acordo com os sintomas do doente, com laqueação uni ou bilateral ou aplicação de clips entre R2-R5. Neste artigo apresentamos a experiência do nosso serviço na realização de simpaticectomia torácica por VATS através do programa de Cirurgia de Ambulatório. Materiais e métodos: Estudo retrospectivo de análise de dados clínicos de doentes submetidos a simpaticectomia torácica por VATS através do programa de cirurgia de ambulatório entre Janeiro de 2014 e Janeiro de 2016. Resultados: Foram efectuadas 198 simpaticectomias torácicas por VATS no período descrito. Os pacientes tinham em média 32,8 anos, sendo 63.6% do sexo feminino e 36.4% do sexo masculino. Das 198 simpaticectomias torácicas por VATS realizadas, 181 (91,4%) foram bilaterais com laqueação ao nível de R3-R5, 12 (6,1%) foram realizadas com aplicação de clips em R2-R4, e em 3 doentes (1.5%) a cirurgia não pode ser realizadas pela presença de aderências pleuro-pulmonares. Um paciente foi submetido a novo procedimento por recorrência dos sintomas e outro paciente foi submetido a remoção dos clips aplicados bilateralmente em R2 por hiperhidrose abdominal compensatória acentuada. Três doentes desenvolveram pneumotórax. Conclusão: O tratamento cirúrgico da hiperhidrose palmar e axilar através da simpaticectomia bilateral constitui o procedimento mais frequente na cirurgia de ambulatório do Serviço de Cirurgia Cardiotorácica do Hospital de Santa Maria do Centro Hospitalar Lisboa Norte. A realização do procedimento sem colocação de drenagens torácicas permitiu realizá-lo no regime de ambulatório. Trata-se de um procedimento eficaz, com baixa taxa de recidiva de sinais e sintomas e com rápida recuperação. Com exceção de 3 doentes, todos tiveram alta nas primeiras 12h pós-operatório. Os bons resultados obtidos e a redução da lista de espera constituem um incentivo para a manutenção do programa de ambulatório da Cirurgia Cardiotorácica.

The impact of cardiopulmonary bypass time on the Sequential Organ Failure Assessment score after cardiac surgery.

OBJECTIVES: Postoperative organ dysfunction is common after cardiac surgery, particularly when cardiopulmonary bypass (CPB) is used. The Sequential Organ Failure Assessment (SOFA) score is validated to predict morbidity and mortality in cardiac surgery. However, the impact of CPB duration on postoperative SOFA remains unclear. METHODS: This is a retrospective study. Categorical values are presented as percentages. The comparison of SOFA groups utilized the Kruskal-Wallis chi-squared test, complemented by ad hoc Dunn's test with Bonferroni correction. Multinomial logistics regressions were employed to evaluate the relationship between CPB time and SOFA. RESULTS: A total of 1032 patients were included. CPB time was independently associated with higher postoperative SOFA scores at 24 h. CPB time was significantly higher in patients with SOFA 4-5 (**P = 0.0022) or higher (***P < 0.001) when compared to SOFA 0-1. The percentage of patients with no/mild dysfunction decreased with longer periods of CPB, down to 0% for CPB time >180min (50% of the patients with >180m in of CPB presented SOFA ≥ 10). The same trend is observed for each of the SOFA variables, with higher impact in the cardiovascular and renal systems. Severe dysfunction occurs especially >200 min of CPB (cardiovascular system >100 min; other systems mainly >200 min). CONCLUSIONS: CPB time may predict the probability of postoperative SOFA categories. Patients with extended CPB durations exhibited higher SOFA scores (overall and for each variable) at 24 h, with higher proportion of moderate and severe dysfunction with increasing times of CPB.

Activated clotting time value as an independent predictor of postoperative bleeding and transfusion.

OBJECTIVES: Activated clotting time (ACT) is commonly used to monitor anticoagulation during cardiac surgeries. Final ACT values may be essential to predict postoperative bleeding and transfusions, although ideal values remain unknown. Our aim was to evaluate the utility of ACT as a predictor of postoperative bleeding and transfusion use. METHODS: Retrospective study (722 patients) submitted to surgery between July 2018-October 2021. We compared patients with final ACT < basal ACT and final ACT ≥ basal ACT and final ACT < 140 s with ≥140 s. Continuous variables were analysed with the Wilcoxon rank-sum test; categorical variables using Chi-square or Fisher's exact test. A linear mixed regression model was used to analyse bleeding in patients with final ACT < 140 and ≥140. Independent variables were analysed with binary logistic regression models to investigate their association with bleeding and transfusion. RESULTS: Patients with final ACT ≥ 140 s presented higher postoperative bleeding than final ACT < 140 s at 12 h (P = 0.006) and 24 h (**P = 0.004). Cardiopulmonary bypass (CPB) time [odds ratio (OR) 1.009, 1.002-1.015, 95% confidence interval (CI)] and masculine sex (OR 2.842,1.721-4.821, 95% CI) were significant predictors of bleeding. Patients with final ACT ≥ 140 s had higher risk of UT (OR 1.81, 1.13-2.89, 95% CI; P = 0.0104), compared to final ACT < 140 s. CPB time (OR 1.019,1.012-1.026, 95% CI) and final ACT (OR 1.021,1.010-1.032, 95% CI) were significant predictors of transfusion. Female sex was a predictor of use of transfusion, with a probability for use of 27.23% (21.84-33.39%, 95% CI) in elective surgeries, and 60.38% (37.65-79.36%, 95% CI) in urgent surgeries, higher than in males. CONCLUSIONS: Final ACT has a good predictive value for the use of transfusion. Final ACT ≥ 140 s correlates with higher risk of transfusion and increased bleeding. The risk of bleeding and transfusion is higher with longer periods of CPB. Males have a higher risk of bleeding, but females have a higher risk of transfusion.

Surgical aortic valve replacement in octogenarians: Single-center perioperative outcomes and five-year survival.

INTRODUCTION AND OBJECTIVES: Aortic stenosis is the most common valvular heart disease. The number of octogenarians proposed for intervention is growing due to increased lifespan. In this manuscript we aim to evaluate perioperative outcome and long-term survival after surgical aortic valve replacement (SAVR) in octogenarians, comparing patients with low surgical risk (EuroscoreII <4%) with intermediate-high risk (EuroscoreII ≥4%). METHODS: A retrospective observational single-center cohort study with 195 patients aged ≥80 years old, who underwent SAVR between 2017 and 2021, was conducted. Patients were divided into two groups according to EuroscoreII: (1) Low risk (EuroscoreII <4%) with intermediate-high risk (EuroscoreII ≥4%). Continuous variables are presented in median (IQR), analyzed using Wilcoxon rank sum test; categorical variables in percentages, analyzed using chi-squared test; and survival was analyzed by Kaplan-Meier, open cohort, and the log-rank test was performed. RESULTS: The overall median age was 82 (IQR 81-83), with 4.6% of the patients ≥85 years old. 23.6% of the patients presented EuroscoreII ≥4%. No complications were observed in 26.2%, with a significantly higher rate in intermediate-high risk patients. Postoperative need for hemodynamic support was the most frequent complication, followed by postoperative acute kidney injury and the use of blood products. Overall median ICU stay was three days (2-4) and hospital length of stay (LOS) six days (5-8). Patients with intermediate-high risk and those with complications had longer ICU LOS. At 12 months, overall survival was 96.4%, at three years 94.1% and 5 years 75.4%. Patients with low surgical risk had higher survival proportions up to 5 years. CONCLUSION: SAVR in patients ≥80 years is associated with low in-hospital mortality, although a significant proportion of patients develop complications. Long-term follow-up up to five years after surgery is acceptable in octogenarians with low surgical risk.

Internal Mammary Artery Skeletonization - Review Of Current Evidence.

Internal mammary artery (IMA) harvesting is a central part in coronary artery bypass grafting (CABG). The technique of harvesting the IMA - pedicled, skeletonized, or semi-skeletonized, may influence intra-operatory and postoperatory outcomes. We aim to review current evidence regarding the advantages and disadvantages of these techniques, and their performance in certain subsets of patients.

Ascending Aorta Sacular Aneurysm.

. A 83 year old woman with history of arterial hypertension, hypothyroidism, obesity, chronic renal insufficiency and incipient dementia was transferred to our hospital after complaints of chest pain. Investigation revealed a sacular ascending aortic aneurysm with the aneurysmal sac adjacent to the sternum. Due to her age, cognitive state and risk of sternal entry, she was refused for surgery. She was discharged after coronariography showed normal coronaries and other causes of chest pain were excluded. She is still alive and stable after 40 months, with no growth of aneurysm dimensions.

Conduction Disorders And Their Clinical Impact After Sutureless/Rapid Deployment Aortic Bioprosthesis.

INTRODUCTION: Aortic stenosis remains the number one heart valve pathology. The drive to improve the surgical outcomes brought to focus rapid deployment valves (RDV), which reduce aortic cross-clamping and cardio-pulmonary bypass (CPB) times. However, some centers have reported a higher rate of conduction abnormalities and permanent pacemaker (PPM) implantation. The aim of this study was to investigate the incidence of conduction abnormalities after aortic valve replacement with RDV, as well as its impact on immediate postoperative outcomes. METHODS: Retrospective analysis of associated conductions disorders and PPM implantation rates, as well as post-operative outcomes of all patients undergoing isolated aortic valve replacement between April 2014 and December 2019 with an RDV. Comparative analysis between the group with PPM implantation and the one with no PPM implantation. Patients with previous PPM implantation, reoperations and patients with missing pre or postoperative ECG data were excluded. RESULTS: We studied 201 patients. The majority of conduction abnormalities were left bundle branch block (54,0%). Twenty-six PPM were implanted (12,6%). Pre-operative characteristic between the groups were similar and little differences were found in regard to most complications. However, the PPM group showed significantly higher rates of stroke (7.7% vs 0.0%, p=0.016) and hemodynamic support for longer than 24 hours (60.0% vs 36.1%, p=0.028). From the multivariable analysis, preoperative right bundle branch block was the only independent risk factor associated with PPM. CONCLUSIONS: PPM implantation rates with RDV are relatively high and are associated with prolonged hospital and ICU stays, postoperative stroke rates and requirement of aminergic support. Their use should be made on a case-by-case basis taking into consideration the existence of preoperative conduction disorders, especially right bundle branch block.

Bioprosthetic Aortic Valve Degeneration: a Review from a Basic Science Perspective.

INTRODUCTION: The increase in the prevalence of aortic stenosis due to an aging population has led to an increasing number of surgical aortic valve replacements. Over the past 20 years, there has been a major shift in preference from mechanical to bioprosthetic valves. However, despite efforts, there is still no "ideal" bioprosthesis. It is crucial to understand the structure, biology, and function of native heart valves to design more intelligent, strong, durable, and physiological heart valve tissues. METHODS: A comprehensive review of the literature was performed to identify articles reporting the basic mechanisms of bioprosthetic valve dysfunction and the biology of native valve cells. Searches were run in PubMed, MEDLINE® (the Medical Literature Analysis and Retrieval System Online), and Google Scholar. Terms for subject heading and keywords search included "biological heart valve dysfunction", "bioprosthesis dysfunction", "bioprosthesis degeneration", and "tissue heart valves". RESULTS: All the relevant findings are summarized in the appropriate subsections. Structural dysfunction is a logical and expected consequence of the chemical, mechanical, and immunological processes that occur during fixation, manufacture, and implantation. CONCLUSION: Biological prosthesis valve dysfunction is a clinically significant process. It has become a major issue considering the growing rate of bioprosthesis implantation and improved long-term patient survival. Understanding bioprosthetic aortic valve degeneration from a basic science perspective is a key point to improve technologic advances and specifications that lead to a new generation of bioprostheses.

Sequential Organ Failure Assessment Score in the ICU As a Predictor of Long-Term Survival After Cardiac Surgery.

OBJECTIVES: The Sequential Organ Failure Assessment (SOFA) score is a predictor of mortality in ICU patients. Although it is widely used and has been validated as a reliable and independent predictor of mortality and morbidity in cardiac ICU, few studies correlate early postoperative SOFA with long-term survival. DESIGN: Retrospective observational cohort study. SETTING: Tertiary academic cardiac surgery ICU. PATIENTS: One-thousand three-hundred seventy-nine patients submitted to cardiac surgery. INTERVENTIONS: SOFA 24 hours, SOFA 48 hours, mean, and highest SOFA scores were correlated with survival at 12 and 24 months. Wilcoxon tests were used to analyze differences in variables. Multivariate logistic regressions and likelihood ratio test were used to access the predictive modeling. Receiver operating characteristic curves were used to assess accuracy of the variables in separating survivor from nonsurvivors. MEASUREMENTS AND MAIN RESULTS: Lower SOFA scores have better survival rates at 12 and 24 months. Highest SOFA and SOFA at 48 hours showed to be better predictors of outcome and to have higher accuracy in distinguishing survivors from nonsurvivors than initial SOFA and mean SOFA. A decreasing score during the first 48 hours had mortality rates of 4.9%, while an unchanged or increased score was associated with a mortality rate of 5.7%. CONCLUSIONS: SOFA score in the ICU after cardiac surgery correlated with survival at 12 and 24 months. Patients with lower SOFA scores had higher survival rates. Differences in survival at 12 months were better correlated with the absolute value at 48 hours than with its variation. SOFA score may be useful to predict long-term outcomes and to stratify patients with higher probability of mortality.