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1.
Plants (Basel) ; 10(2)2021 Jan 23.
Artigo em Inglês | MEDLINE | ID: mdl-33498692

RESUMO

The bell pepper is a vegetable with high antioxidant content, and its consumption is important because it can reduce the risk of certain diseases in humans. Plants can be affected by different types of stress, whether biotic or abiotic. Among the abiotic factors, there is saline stress that affects the metabolism and physiology of plants, which causes damage, decreasing productivity and quality of fruits. The objective of this work was to evaluate the application of selenium, silicon and copper nanoparticles and saline stress on the bioactive compounds of bell pepper fruits. The bell pepper plants were exposed to saline stress (25 mM NaCl and 50 mM) in the nutrient solution throughout the crop cycle. The nanoparticles were applied drenching solution of these to substrate (Se NPs 10 and 50 mg L-1, Si NPs 200 and 1000 mg L-1, Cu NPs 100 and 500 mg L-1). The results show that saline stress reduces chlorophylls, lycopene, and ß-carotene in leaves; but increased the activity of some enzymes (e.g., glutathione peroxidase and phenylalanine ammonia lyase, and glutathione). In fruits, saline stress decreased flavonoids and glutathione. The nanoparticles increased chlorophylls, lycopene and glutathione peroxidase activity in the leaves; and ascorbate peroxidase, glutathione peroxidase, catalase and phenylalanine ammonia lyase activity, and also phenols, flavonoids, glutathione, ß-carotene, yellow carotenoids in fruits. The application of nanoparticles to bell pepper plants under saline stress is efficient to increase the content of bioactive compounds in fruits.

2.
Int J Mol Sci ; 20(8)2019 Apr 20.
Artigo em Inglês | MEDLINE | ID: mdl-31010052

RESUMO

Early blight is a disease that greatly affects Solanaceae, mainly damaging tomato plants, and causing significant economic losses. Although there are methods of biological control, these are very expensive and often their mode of action is slow. Due to this, there is a need to use new techniques that allow a more efficient control of pathogens. Nanotechnology is a new alternative to solve these problems, allowing the creation of new tools for the treatment of diseases in plants, as well as the control of pathogens. The aim of the present investigation was to evaluate the foliar application of selenium and copper in the form of nanoparticles in a tomato crop infested by Alternaria solani. The severity of Alternaria solani, agronomic variables of the tomato crop, and the changes in the enzymatic and non-enzymatic antioxidant compounds were evaluated. The joint application of Se and Cu nanoparticles decreases the severity of this pathogen in tomato plants. Moreover, high doses generated an induction of the activity of the enzymes superoxide dismutase, ascorbate peroxidase, glutathione peroxidase (GPX) and phenylalanine ammonia lyase in the leaves, and the enzyme GPX in the fruit. Regarding non-enzymatic compounds in the leaves, chlorophyll a, b, and totals were increased, whereas vitamin C, glutathione, phenols, and flavonoids were increased in fruits. The application of nanoparticles generated beneficial effects by increasing the enzymatic and non-enzymatic compounds and decreasing the severity of Alternaria solani in tomato plants.


Assuntos
Alternaria/fisiologia , Cobre/farmacologia , Nanopartículas/química , Selênio/farmacologia , Solanum lycopersicum/microbiologia , Solanum lycopersicum/fisiologia , Estresse Fisiológico/efeitos dos fármacos , Alternaria/efeitos dos fármacos , Antioxidantes/metabolismo , Antioxidantes/farmacologia , Produtos Agrícolas/efeitos dos fármacos , Produtos Agrícolas/crescimento & desenvolvimento , Solanum lycopersicum/efeitos dos fármacos , Solanum lycopersicum/crescimento & desenvolvimento , Fenilalanina Amônia-Liase/metabolismo , Pigmentos Biológicos/metabolismo , Doenças das Plantas/microbiologia , Folhas de Planta/efeitos dos fármacos , Folhas de Planta/metabolismo
3.
Int J Mol Sci ; 20(1)2019 Jan 04.
Artigo em Inglês | MEDLINE | ID: mdl-30621162

RESUMO

Biostimulants are materials that when applied in small amounts are capable of promoting plant growth. Nanoparticles (NPs) and nanomaterials (NMs) can be considered as biostimulants since, in specific ranges of concentration, generally in small levels, they increase plant growth. Pristine NPs and NMs have a high density of surface charges capable of unspecific interactions with the surface charges of the cell walls and membranes of plant cells. In the same way, functionalized NPs and NMs, and the NPs and NMs with a corona formed after the exposition to natural fluids such as water, soil solution, or the interior of organisms, present a high density of surface charges that interact with specific charged groups in cell surfaces. The magnitude of the interaction will depend on the materials adhered to the corona, but high-density charges located in a small volume cause an intense interaction capable of disturbing the density of surface charges of cell walls and membranes. The electrostatic disturbance can have an impact on the electrical potentials of the outer and inner surfaces, as well as on the transmembrane electrical potential, modifying the activity of the integral proteins of the membranes. The extension of the cellular response can range from biostimulation to cell death and will depend on the concentration, size, and the characteristics of the corona.


Assuntos
Nanopartículas , Nanoestruturas , Plantas/metabolismo , Equilíbrio Ácido-Base , Cobre/metabolismo , Concentração de Íons de Hidrogênio , Membranas Intracelulares/metabolismo , Concentração Osmolar , Oxirredução , Coroa de Proteína/metabolismo , Eletricidade Estática , Titânio/metabolismo
4.
World Neurosurg ; 82(6): 1283-90, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25045790

RESUMO

OBJECTIVE: Tumors of the jugular foramen are notably rare, and the majority of them arise from the glomic tissue of the jugular vein. There are other tumors that do not originate from that tissue, and these are called the nonglomic tumors. This report includes a series of patients with nonglomic tumors of the jugular foramen to analyze their biological and radiological behavior and the clinical outcomes of patients. METHODS: Patients with tumors of the jugular foramen other than chemodectomas were included for the present series. All of the patients were subjected to a protocol that included imaging studies and a complete clinical evaluation. Surgery was planned and performed by a multidisciplinary team using the following approaches: retrosigmoid, infratemporal fossa, and zygomatic-transmandibular. Depending on the precise diagnosis and surgical outcomes, radiotherapy or radiosurgery were indicated. The average follow-up period was 5 years. RESULTS: Thirty patients with nonglomic tumors were included: 18 schwannomas, 6 meningiomas, 5 chordomas, and 1 metastatic carcinoma. The patients with chordomas had the most severe clinical manifestations, and the chordomas were the largest and most invasive tumors that destroyed the jugular foramen contour on imaging studies. Schwannomas presented a more benign clinical evolution and enlarged (but did not destroy) the jugular foramen contour. Two patients died (chordomas) during the follow-up because of tumor activity. CONCLUSIONS: The most common nonglomic tumor of the jugular foramen was the schwannoma, which was the lesion with the best surgical prognosis. Chordoma is a rare and highly destructive tumor that has a notably high recurrence index.


Assuntos
Tumor do Glomo Jugular/diagnóstico , Tumor do Glomo Jugular/cirurgia , Neoplasias da Base do Crânio/diagnóstico , Neoplasias da Base do Crânio/cirurgia , Adulto , Idoso , Terapia Combinada , Estudos Transversais , Diagnóstico Diferencial , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Procedimentos Neurocirúrgicos/métodos , Prognóstico , Estudos Retrospectivos , Resultado do Tratamento , Adulto Jovem
5.
Angiology ; 54(6): 695-700, 2003.
Artigo em Inglês | MEDLINE | ID: mdl-14666958

RESUMO

The traditional and most effective form of treatment of persistent ductus arteriosus is surgical ductal division. New therapeutic techniques such as intraluminal ductal occlusion are currently recommended to replace the traditional treatment procedure. The purpose of this paper is to analyze the state of the art of these new therapeutic modalities. From reports in the medical literature, the authors analyzed the indications, results, and complications of the intraluminal ductal occlusion procedures. They applied the Student's t test for independent samples to evaluate the results of intraluminal patent ductus arteriosus occlusion by means of umbrellas, buttons, coils, and Gianturco-Grifka and Amplatzer occluders, respectively, in 2,691 patients collected from the medical literature. According to their analysis the results of intraluminal ductal occlusion with coils were as follows: success 83.7 +/- 12.2%, failure 3.9 +/- 2.8%, incomplete ductal occlusion 17.5 +/- 15.3%, need for surgery 2.8 +/- 3.8%, need for a second intraluminal procedure 5.8 +/- 9.9%, and device embolization 6.2 +/- 7.2%. The use of the Gianturco-Grifka device showed the following results: success 96.0 +/- 5.6%, failure 4.0 +/- 5.6%, incomplete ductal occlusion 4.0 +/- 5.6%, need for surgery 0%, need for a second intraluminal procedure 4.0 +/- 5.6%, and device embolization 4.0 +/- 5.6%. The Amplatzer occluder showed the following results: success 92.8 +/- 6.1%, failure 7.2 +/- 6.1%, incomplete ductal occlusion 2.0 +/- 4.3%, need for surgery 0%, need for a second intraluminal procedure 0.8 +/- 1.7%, and device embolization 0.5 +/- 1.3%. According to the state of the art, intraluminal ductal occlusion with Gianturco-Grifka device and Amplatzer occluder reduces the proportion of incomplete obstructions and need for surgery. Additionally, the use of the Amplatzer occluder reduces need for a second procedure and the embolization rate. Although the results obtained with the new procedures are better than those obtained previously, they are still not totally satisfactory.


Assuntos
Permeabilidade do Canal Arterial/terapia , Humanos
6.
Arch Cardiol Mex ; 73(1): 31-7, 2003.
Artigo em Espanhol | MEDLINE | ID: mdl-12820492

RESUMO

OBJECTIVE: The authors present the clinical cases of three adult patients (49, 53 and 61 year-old), with rheumatic cardiac valvulopathy, and bilateral coronary arteriovenous fistulae draining in the main pulmonary artery. Based on documental investigation, the authors speculate about the predeterminate origin of coronary arteriovenous fistulae. DISCUSSION: At first glance, it seems obvious that congenital cardiopathies occur at random, i.e., embryonic development deviate or stops due to unknown reasons, originating the persistence of lacunar blood spaces prior to the development of coronary arteries cords. There are two factors involved in the genesis of congenital malformations: a genomic preexisting factor and the presence of an environmental precipitating factor, i.e., isolated pulmonary valve atresia or left ventricular hypoplastic syndrome, with mitral and aortic valve stenosis, can predispose development of coronary arteriovenous fistulae. Recently, the question has been raised whether there is a relation of coronary arteries fistulae with: ethnic groups, hereditary gigantism, autoimmune diseases, such as polymyositis, hereditary hemorrhagic telangiectasia, and apical hypertrophic myocardiopathy. CONCLUSION: Coronary arteriovenous fistulae, as well as some congenital cardiopathies, could be due to chromosome alterations or might be related to hereditary diseases, such as hemorrhagic telangiectasia, induced by a disturbed genetic program. Although, there is no concrete evidence that a genetic factor is related to the development of coronary arteriovenous fistulae, there are signs that suggest that such a possibility could be investigated.


Assuntos
Fístula Arteriovenosa/diagnóstico por imagem , Anomalias dos Vasos Coronários/diagnóstico por imagem , Artéria Pulmonar/anormalidades , Angiografia Coronária , Humanos , Masculino , Pessoa de Meia-Idade , Artéria Pulmonar/diagnóstico por imagem
7.
Angiology ; 53(6): 685-92, 2002.
Artigo em Inglês | MEDLINE | ID: mdl-12463622

RESUMO

The importance of recognizing the association between aortoiliac disease and coronary artery disease includes the following: (1) Long-term morbidity is higher and survival ratio poorer in patients with coronary heart disease compared with isolated lower extremity revascularization surgery. (2) Coronary artery bypass grafting is a relatively high-risk procedure in patients with severe vascular disease. (3) There is the prospect that the patient will eventually face simultaneous coronary artery and vascular surgery, or coronary artery angioplasty previous to aortoiliac surgery. The aim of this investigation is to know the frequency of the association of coronary artery disease with aortoiliac lesions and to stratify the risk factors related to such an association. In total, 65 men and 19 women (30 to 76 years of age) with a history of coronary heart disease underwent abdominal aortography after selective coronary artery and left ventricle angiography. Aortoiliac lesions were identified at angiograms. Relevant coronary artery disease was diagnosed when at least 1 coronary artery was obstructed > 50%. The frequency of association between aortoiliac and coronary artery lesions was established, as well as the relationship of these lesions to the following clinical variables: age, weight, height, smoking habit, history of coronary heart disease, systemic arterial hypertension, diabetes mellitus, intermittent claudication, glycemia, uricemia, and triglyceridemia. There were 36 patients (42.9%) with aortoiliac lesions. In 34 patients (40.5%) coronary artery disease was associated with aortoiliac lesions. Abdominal aortic dilations were found in 10 instances, abdominal aortic stenosis in 13 patients, and stenosis of the iliac arteries or their branches on 28 occasions. The variables statistically related to the presence of aortoiliac lesions were smoking habit and a history of intermittent claudication. The number of affected coronary arteries was directly related to the frequency of aortoiliac lesions. In the entire sample, 11 patients (13%) had no coronary artery disease, and 15 (17.9%) had 1-vessel, 24 (28.6%) 2-vessel, and 34 (40.5%) 3-vessel disease. The extent of coronary disease was directly related to the frequency and extent of aortoiliac lesions. Frequencies of aortoiliac lesions were strongly related to a history of smoking habit and intermittent claudication and directly related to the extent of coronary artery disease.


Assuntos
Doenças da Aorta/diagnóstico por imagem , Doença das Coronárias/diagnóstico por imagem , Artéria Ilíaca , Adulto , Idoso , Aorta Abdominal , Doenças da Aorta/epidemiologia , Angiografia Coronária , Doença das Coronárias/epidemiologia , Feminino , Humanos , Claudicação Intermitente/epidemiologia , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Fumar/epidemiologia
8.
Arch Cardiol Mex ; 72(4): 306-10, 2002.
Artigo em Espanhol | MEDLINE | ID: mdl-12613440

RESUMO

BACKGROUND: Few cases of Buerger's disease concurring with visceral disorders, i.e., cardiac disease characterized by coronary obstruction have been published. We report the case of a 56 years old patient, with Buerger's disease concurring with ischemic heart disease: extensive anterior myocardial infarction, thrombosis, and obstruction of the left anterior descending coronary artery, evidenced through coronariography. DESCRIPTION OF THE CASE: Male patient, 56 years old, severe smoker since the age of 15, obese, normal blood pressure, carrier of Buerger's disease for 15 years, without symptoms or signs of rheumatic disorders, and negative immunological tests, with antecedents of an old extensive myocardial infarction secondary to diffuse disease of the left anterior descending artery. At present, with symptoms and signs of ischemic cardiopathy and angiographic images suggesting the presence of thrombi inside the anterior descending coronary artery, of gracile aspect (corkscrew image), severe and diffusely obstructed (80%), and poor distal vascular bed. DISCUSSION: Causal association between Buerger's disease and coronary disease is rare and difficult to demonstrate in the absence of immunological and histopathological tests. Data provided by coronariography do not evidence a common origin for both diseases. However, the angiographic image of the gracile coronary artery, corkscrew-shaped, and with intraluminal thrombi suggests dissemination of the thromboangiitis to the coronary arterial bed. CONCLUSION: The concurrence of Buerger's disease with coronary pathology is rare. Coronary dissemination is difficult to demonstrate with only coronariography data; however, there are data in the medical literature suggesting that coronary obstruction, in these cases, results from the dissemination of the vasculopathy.


Assuntos
Infarto do Miocárdio/complicações , Tromboangiite Obliterante/complicações , Humanos , Masculino , Pessoa de Meia-Idade
9.
Arch. cardiol. Méx ; 72(4): 306-310, 2002. ilus
Artigo em Espanhol | LILACS | ID: lil-775071

RESUMO

Antecedentes: Se han publicado pocos casos en que coincide la enfermedad de Buerger con la afección visceral, entre ellas la cardíaca, caracterizada por obstrucción arterial coronaria. Relatamos el caso de un paciente de 56 años, con enfermedad de Buerger coincidente con cardiopatía isquémica: infarto extenso anterior del miocardio, trombosis y obstrucción de la arteria coronaria descendente anterior mostrada en la coronariografía. Presentación del caso: Varón de 56 años, fumador compulsivo desde los 15 años de edad, obeso, normotenso arterial, portador de enfermedad de Buerger desde hace 15 años, sin síntomas ni signos de enfermedades reumatológicas y exámenes inmunológicos negativos, con antecedentes de infarto antiguo del miocardio anterior extenso, secundario a enfermedad difusa de la arteria coronaria descendente. Actualmente presenta síntomas y signos de cardiopatía isquémica e imágenes angiográficas sugestivas de trombos en el interior de la arteria coronaria descendente anterior, de aspecto grácil (imagen en tirabuzón), severa y difusamente obstruida (80%) y mal lecho vascular distal. Discusión: La asociación causal entre la enfermedad de Buerger y la enfermedad coronaria es rara y difícil de probar en ausencia de exámenes inmunológicos e histopatológicos y los datos aportados por la arteriografía coronaria no prueban que ambas entidades tengan origen común. Sin embargo, la imagen angiográfica de la arteria coronaria grácil, en tirabuzón y con trombos intraluminales sugiere extensión de la tromboangeítis hacia el lecho arterial coronario. Conclusión: Es rara la coincidencia de la enfermedad de Buerger con arteriopatía coronaria. La extensión coronaria es difícil de demostrar solamente con los datos coronariográficos; sin embargo, hay datos en la literatura médica que sugieren que la obstrucción arterial coronaria, en estos casos, es el resultado de la extensión de la vasculopatía.


Background: Few cases of Buerger's disease concurring with visceral disorders, i.e., cardiac disease characterized by coronary obstruction have been published. We report the case of a 56 years old patient, with Buerger's disease concurring with ischemic heart disease: extensive anterior myocardial infarction, thrombosis, and obstruction of the left anterior descending coronary artery, evidenced through coronariography. Description of the case: Male patient, 56 years old, severe smoker since the age of 15, obese, normal blood pressure, carrier of Buerger's disease for 15 years, without symptoms or signs of rheumatic disorders, and negative immunological tests, with antecedents of an old extensive myocardial infarction secondary to diffuse disease of the left anterior descending artery. At present, with symptoms and signs of ischemic cardiopathy and angiographic images suggesting the presence of thrombi inside the anterior descending coronary artery, of gracile aspect (corkscrew image), severe and diffusely obstructed (80%), and poor distal vascular bed. Discussion: Causal association between Buerger's disease and coronary disease is rare and difficult to demonstrate in the absence of immunological and histopathological tests. Data provided by coronariography do not evidence a common origin for both diseases. However, the angiographic image of the gracile coronary artery, corkscrew-shaped, and with intraluminal thrombi suggests dissemination of the thromboangiitis to the coronary arterial bed. Conclusion: The concurrence of Buerger's disease with coronary pathology is rare. Coronary dissemination is difficult to demonstrate with only coronariography data; however, there are data in the medical literature suggesting that coronary obstruction, in these cases, results from the dissemination of the vasculopathy.


Assuntos
Humanos , Masculino , Pessoa de Meia-Idade , Infarto do Miocárdio/complicações , Tromboangiite Obliterante/complicações
10.
Arch. cardiol. Méx ; 71(2): 146-150, abr.-jun. 2001. ilus, tab, CD-ROM
Artigo em Inglês | LILACS | ID: lil-306491

RESUMO

Presentamos el caso de una mujer de 26 años de edad, con 56 kg de peso y 154 cm de estatura; persistencia de conducto arterioso gigante (2.4 cm de diámetro interno), comunicación interventricular, discreto estrechamiento preductal del arco aórtico e hipertensión arterial pulmonar que no disminuyó después de la inhalación de oxígeno al 100 por ciento. Con base en los datos hemodinámicos y embriológicos, especulamos, sobre el probable origen de la dilatación ductal.


Assuntos
Humanos , Feminino , Adulto , Coartação Aórtica/diagnóstico , Permeabilidade do Canal Arterial , Comunicação Interventricular , Canal Arterial , Hipertensão Pulmonar
11.
Arch. Inst. Cardiol. Méx ; 70(6): 596-602, nov.-dic. 2000. ilus, tab
Artigo em Inglês | LILACS | ID: lil-286167

RESUMO

Los autores presentan el caso de una mujer de 26 años, en clase funcional I (según criterio de la NYHA), con origen de la arteria pulmonar derecha en la aorta, asociado a la persistencia del conducto arterioso y severa hipertensión arterial pulmonar (101/40-70 mm Hg), la cual permaneció elevada (89/40-60 mm Hg) después del suministro de O2 al 100 por ciento. La presión de la arteria pulmonar derecha (125/60-86 mm Hg) resultó más alta que la presión del tronco de la arteria pulmonar y similar a la aórtica. La paciente fue tratada con éxito mediante la división quirúrgica del conducto arterioso y la anastomosis término terminal de la arteria pulmonar con la arteria pulmonar derecha. Seis meses después de la cirugía, la presión sistólica de la arteria pulmonar, determinada por medio de la ecocardiografía Doppler, fue 60 mm Hg. El ecocardiograma bidimensional mostró la correcta anastomosis de la arteria pulmonar derecha con la arteria pulmonar. La gammagrafía pulmonar mostró la perfusión de ambos pulmones por la arteria pulmonar; si bien, la perfusión del pulmón derecho fue menor que la del izquierdo: 30 vs. 70 por ciento, respectivamente. El origen anómalo de una de las ramas de la arteria pulmonar en la aorta se observa mayormente en niños menores de 1 año; la frecuencia de este padecimiento es <1 por ciento de todas las cardiopatías congénitas y la sobrevida de los pacientes con esta cardiopatía es muy corta. La originalidad del caso clínico aquí descrito es que se trata de un paciente con una cardiopatía rara en el adulto, tratada quirúrgicamente.


Assuntos
Humanos , Feminino , Adulto , Aorta Torácica/anormalidades , Permeabilidade do Canal Arterial/diagnóstico , Artéria Pulmonar/anormalidades , Cardiopatias Congênitas/diagnóstico , Hipertensão Pulmonar
12.
Arch. Inst. Cardiol. Méx ; 70(6): 603-8, nov.-dic. 2000. ilus, tab
Artigo em Espanhol | LILACS | ID: lil-286168

RESUMO

Los autores informan sobre 7 casos clínicos de ergotismo gangrenoso (6 mujeres y 1 hombre) provocado por la ingestión inmoderada de ergotamina ministrada para aliviar las crisis de migraña. En todos los enfermos estaban presentes síntomas y signos clínicos, ecográficos y angiográficos de constricción arterial severa y ninguno sufrió alucinaciones. El ergotismo fue tratado con la suspensión de la ergotamina, la ministración de vasodilatadores y la simpatectomía. Después del tratamiento, la mejoría de los 7 pacientes fue evidente por la desaparición de los síntomas y signos de isquemia distal y aumento significativo (P < 0.05) del índice pletismográfico de perfusión sanguínea, medido por medio de la ecografía Doppler. Estos cambios fueron observados aún en un paciente que perdió 2 dedos del pie derecho, secundariamente al ergotismo gangrenoso. Si bien, ninguno de los enfermos manifestó alucinaciones, los autores hacen referencia al primer uso del cornezuelo de centeno, reconocido históricamente, en las ceremonias mágico religiosas de Eleusis de la Grecia clásica; así, como al caso de brujería de Salem, Nueva Inglaterra, en 1692. La migraña no puede ser considerada banal; frecuentemente, causa desesperación del enfermo, que se intoxica con la ergotamina, cuando es sólo este medicamento el recomendado por su médico tratante. En consecuencia, el médico especialista, familiar, general o rural, debe conocer perfectamente la terapia profiláctica de las crisis de migraña con medicamentos vasodilatadores y así, reducir la posibilidad de ergotismo.


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Automedicação/efeitos adversos , Claviceps , Ergotamina/efeitos adversos , Ergotismo/diagnóstico , Alcaloides de Claviceps/efeitos adversos , Enxaqueca sem Aura/tratamento farmacológico , Psicotrópicos/efeitos adversos
13.
Arch. Inst. Cardiol. Méx ; 70(1): 66-71, ene.-feb. 2000. ilus, tab
Artigo em Inglês | LILACS | ID: lil-280393

RESUMO

Los autores presentan el caso de una mujer de 27 años, con signos y síntomas de insuficiencia cardiaca congestiva rebelde al tratamiento, anemia, úlceras en la mucosa gingival, fotosensibilidad y alopecia. Los datos electrocardiográficos, ecocardiográficos, angiográ-ficos y hemodinámicos orientaron el diagnóstico de cardiomiopatía restrictiva, insuficiencia mitral secundaria a prolapso mitral y dilatación biauricular. El examen histológico de la biopsia endomiocárdica, tomada durante el cateterismo cardiaco, mostró signos de fibrosis endomiocárdica y el examen inmunológico resultó compatible con lupus eritematoso sistémico. Hasta donde sabemos, este es el primer caso de fibrosis endomiocárdica (enfermedad de Davies) asociado con lupus eritematoso sistémico publicado en la literatura médica. Permanece incierta la etiología de la fibrosis endomiocárdica y su asociación con lupus eritematoso sistémico sugiere el probable origen autoinmune de este padecimiento.


Assuntos
Humanos , Feminino , Adulto , Doenças Autoimunes , Fibrose Endomiocárdica/complicações , Lúpus Eritematoso Sistêmico/complicações , Cardiomiopatias/complicações , Insuficiência Cardíaca
15.
Arch. Inst. Cardiol. Méx ; 69(4): 356-62, jul.-ago. 1999. ilus
Artigo em Inglês | LILACS | ID: lil-258846

RESUMO

Aparte del éxito inmediato de la cirugía y embolización terapéutica de las angiodisplasias, un cierto número de pacientes regresan a la consulta médica con recanalización de las fístulas arteriovenosas, después de haber sido resecadas o embolizadas. A partir de la presentación y discusión de dos casos clínicos de angiodisplasias torácicas: una simple y poco complicada y otra compleja y peligrosa, que amenazaba la vida de la paciente, los autores ponen de relieve las complicaciones y recidivas que siguen al tratamiento quirúrgico o a la embolización arterial terapéutica. La ocurrencia de recidivas tiene lugar aún cuando sea una sóla arteria la que persiste después de la resección quirúrgica o la embolización y hay cosas tan rebeldes al tratamiento que los enfermos imploran la amputación del miembro afectado por la angiodisplasia, la cual renace en el muñón del miembro amputado. La evolución, natural o postoperatoria, de la angiodisplasia está marcada por la angiogénesis incontrolable, cuya causa probable es un error en el programa genético, que persiste a pesar de la resección de la malformación vascular y es la causa del fracaso terapéutico


Assuntos
Humanos , Masculino , Feminino , Adulto , Angiodisplasia/terapia , Circulação Colateral/fisiologia , Fístula Arteriovenosa/diagnóstico , Angiodisplasia/diagnóstico , Angiodisplasia/cirurgia , Angiografia , Embolização Terapêutica , Fístula Arteriovenosa/cirurgia , Fístula Arteriovenosa/terapia , Pé/irrigação sanguínea
16.
Arch. Inst. Cardiol. Méx ; 69(3): 222-7, mayo-jun. 1999. tab, graf
Artigo em Espanhol | LILACS | ID: lil-258831

RESUMO

Estudiamos el efecto terapéutico de la heparina estándar (HS) en comparación con el de la heparina de bajo peso molecular (HBPM) en dos grupos homogéneos de 14 pacientes, elegidos al azar, con historia clínica y signos electrocardiográficos de angina de pecho inestable (AI) tratada convencional y simultáneamente con antiagregantes plaquetarios, nitratos, bloqueadores adrenérgicos beta, si no existía contraindicación, y/o antagonista del calcio. Ambas heparinas por separado mostraron efecto terapéutico significativo sobre los síntomas y signos de la AI. Disminuyeron a cero el número y duración de la isquemia miocárdica sintomática observada en el ECG ambulatorio (ECG-Holter). En lapsos similares desaparecieron los síntomas de la angina de pecho: 51.9 ñ 20.2 min. para la HS y en 48.14 ñ 20.7 min. para la HBPM. Disminuyó la frecuencia de la isquemia miocárdica asintomática descubierta en el ECG-Holter: 9 episodios se redujeron a 4 con la HS y 8 episodios disminuyeron a 3 con la HBPM. Con la HS disminuyó la duración total de la isquemia miocárdica asintomática de 52 min a 15 min. y el promedio de la isquemia miocárdica asintomática disminuyó de 3.71 ñ 3.29 min. a 1.07 ñ 1.81 min (P < 0.01). Con la HBPM disminuyó la duración total de la isquemia miocárdica asintomática de 60 a 10 min. y el promedio de isquemia miocárdica asintomática disminuyó de 4.28 ñ 4.49 min. a 0.71 ñ 1.43 min. (P< 0.02). Después del tratamiento con ambas heparinas se redujo considerablemente la frecuencia de extrasistolia, sobre todo letal. Si bien en este estudio mostramos que no existe diferencia estadística en la acción terapéutica de las heparinas estándar y de bajo peso molecular, la HBPM redujo muy rápidamente los cuadros anginosos, redujo substancialmente tanto la isquemia miocárdica sintomática, como la asintomática y las arritmias, sobre todo extrasístoles ventricular y la taquicardia paroxística auricular. En comparación con la HS, la HBPM es de muy fácil aplicación y no tiene efectos secundarios sobre los tiempos de coagulación y sangrado


Assuntos
Humanos , Feminino , Pessoa de Meia-Idade , Fibrinolíticos/uso terapêutico , Angina Instável/diagnóstico , Angina Instável/tratamento farmacológico , Heparina de Baixo Peso Molecular/uso terapêutico , Distribuição de Qui-Quadrado , Quimioterapia Combinada , Eletrocardiografia Ambulatorial , Heparina/uso terapêutico , Seleção de Pacientes
17.
Arch. Inst. Cardiol. Méx ; 69(2): 134-8, mar.-abr. 1999. tab, ilus
Artigo em Espanhol | LILACS | ID: lil-258821

RESUMO

La comisurotomía mitral percutánea (CMP) es una alternativa terapéutica eficaz en el manejo de pacientes con estenosis valvular mitral (EM) y la presencia de trombos en la aurícula izquierda se ha considerado una contraindicación absoluta para su realización. El objetivo de este estudio es evaluar la seguridad de la CMP en pacientes con EM y trombos en la orejuela de aurícula izquierda (OAI). Entre septiembre de 1996 y de abril de 1997, realizamos diez procedimientos de CMP con técnica de Inoue en pacientes con EM sintomática y trombos en la OAI: nueve pacientes del sexo femenino y un masculino con edad media de 41 ñ 7.6 años. El Score de Wilkins fue 8 ñ 1.2. Antes del procedimiento todos recibieron anticoagulantes orales durante tres a doce meses sin desaparecer el trombo. Empleando ecocardiograma transesofágico y fluoroscopía se evitó el contacto de guías y catéteres con la OAI. Los procedimientos fueron terminados con éxito lográndose un incremento del área valvular mitral de 0.8 ñ 0.2 a 1.95 ñ 0.38 cm². No hubo ningún caso de embolia sistémica u otras complicaciones mayores durante la CMP ni a un año de seguimiento. Concluimos que la CMP es una anternativa terapéutica segura para el manejo de pacientes seleccionados con EM y trombos en la OAI


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Trombose Coronária , Trombose Coronária/cirurgia , Estenose da Valva Mitral/cirurgia , Estenose da Valva Mitral , Anticoagulantes/uso terapêutico , Ecocardiografia Transesofagiana , Eletrocardiografia , Função do Átrio Esquerdo , Hemodinâmica/fisiologia , Trombose
18.
Arch. Inst. Cardiol. Méx ; 69(2): 144-8, mar.-abr. 1999. tab, ilus, graf
Artigo em Inglês | LILACS | ID: lil-258823

RESUMO

La interrupción del arco aórtico es una cardiopatía congénita rara; los pacientes ocasionalmente sobreviven hasta la edad adulta sin cirugía y la sobrevida puede estar influenciada por malformaciones intracardiacas asociadas. El propósito de este artículo es informar los casos clínicos de 3 adultos jóvenes (18-19 años) con interrupción del arco aórtico. Dos de ellos con interrupción del arco aórtico tipo C y el otro tipo B, con comunicación interventricular subpulmonar e insuficiencia valvular pulmonar. Reunimos 106 casos colectados de la literatura médica, divididos en 3 grupos: 1) la muestra completa de pacientes, 2) los pacientes con interrupción del arco aórtico aislado y 3) los pacientes con interrupción del arco aórtico asociada con comunicación interventricular. En la muestra completa, encontramos 18 casos de interrupción del arco aórtico tipo A, 25 casos de interrupción del arco aórtico tipo B, 37 casos de interrupción aislada del arco aórtico y 43 casos asociada con comunicación interventricular. El 55 por ciento de los pacientes murió antes de 15 días de vida (0.042 años). De acuerdo a la gráfica de frecuencia acumulada, solamente 5 por ciento de los pacientes sobrevivió más allá de los 5 años. No encontramos suficiente información para señalar alguna razón que explique la sobrevida de los pacientes en relación al tipo de interrupción del arco aórtico, aunque algunas cardiopatías asociadas acortan la vida y otras, como la doble salida del ventrículo derecho, permiten mayor sobrevida. Llegaron a la adolescencia 7 por ciento de los pacientes con interrupción del arco aórtico asociada a la comunicación interventricular y 14 por ciento de los enfermos con interrupción aislada del arco aórtico. A pesar de esta divergencia, no hubo diferencia estadística significativa entre las medias de edad de estos pacientes (P> 0.25)


Assuntos
Humanos , Masculino , Adolescente , Adulto , Ecocardiografia , Comunicação Interventricular/cirurgia , Síndromes do Arco Aórtico/cirurgia , Autorradiografia , Evolução Fatal , Hemodinâmica/fisiologia , Síndromes do Arco Aórtico/fisiopatologia , Síndromes do Arco Aórtico/mortalidade , Análise de Sobrevida
19.
Arch. med. res ; 29(2): 159-63, abr.-jun. 1998. tab, ilus
Artigo em Inglês | LILACS | ID: lil-232632

RESUMO

Background. The objective of this study is to evaluate the immediate result of the percutaneous mitral valvotomy, compared with patients considered ideal for the perfomance of the procedure. Methods. The authors of this paper compared the immediate results of the percutaneous mitral valvotomy (PVM) performed on two groups of patients. Group I included 20 patients who were good candidates for PVM, with an echocardiographic score of =8, without evidence of left atrial thrombus, and with no recent embolic event. Group II included seven patients with previous mitral commissurotomy (MC). Results. According to the Wilcoxon non-parametric t test analysis, the hemodynamic variables changed significantly in the patients of group I: the mitral area increased from 1.21 ñ 0.41 to 2.62 ñ 0.75 cm² (P=<0.001); the mean left atrial pressure decreased from 17.2 ñ 7.2 mmHg to 9.2 ñ 4.5 mmHg (P=<0.001), and the pressure transmitral gradient decreased 12.4 ñ 6.8 to 3.3 ñ 1.26 mmHg (P=<0.001). No statistically significant difference in the hemodynamic changes of the patients of group II after the PMV was found: the mitral area increased from 1.2 ñ 0.2353 to 1.96 ñ 0.57 cm²; the mean left atrial pressure decreased from 17.2 ñ 10.35 to 12.42 ñ 7.3 mmHg, and the pressure mitral gradient decreased from 11.47 ñ 6.5 to 5.7 ñ 4.8 mmHg. The mitral area determined by echocardiographic procedures showed the same dentency in patients with previous MC. Conclusions. In spite of this tendency, during the follow-up after PMV the NYHA functional class decreased from II-IV to I in the patients with previous MC. Because a second surgical MC results in higher mortality, PMV is indicated in patients with previous MC, delayindg or avoiding a second MC or valve replacement


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Cateterismo , Estenose da Valva Mitral/cirurgia , Estenose da Valva Mitral/terapia , Cirurgia Torácica , Resultado do Tratamento
20.
Arch. Inst. Cardiol. Méx ; 67(5): 411-3, sept.-oct. 1997. ilus
Artigo em Espanhol | LILACS | ID: lil-217320

RESUMO

Paciente del sexo masculino de treinta y cuatro años de edad en aparente buena salud, presentó infarto agudo del miocardio (IAM), Killip II con arterias coronarias normales. No se administró terapia trombolítica. Angiografía selectiva mostró múltiples aneurismas en las arterias mesentéricas y renales. Se estableció el diagnóstico de poliarteritis nudosa (PA). El IAM como complicación en la PA puede ser secundario a la formación de arteritis con trombosis o al desarrollo precoz de aterosclerosis por terapia con esteroides. Este caso, presentado aneurismas múltiples en diferentes órganos, sin antecedentes cardiacos y sin terapia con esteroides, presentó como primera complicación de su padecimiento IAM con coronarias normales, probablemente debido a arteritis selectiva, que de acuerdo a la literatura médica, es una presentación poco frecuente


Assuntos
Humanos , Masculino , Adulto , Aneurisma , Artérias Mesentéricas , Angiografia Coronária , Vasos Coronários , Eletrocardiografia , Infarto do Miocárdio/diagnóstico , Infarto do Miocárdio/etiologia , Poliarterite Nodosa/complicações , Poliarterite Nodosa/diagnóstico , Artéria Renal
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