Results: 1286

Fatores preditores para boa resposta à terapia de ressincronização cardíaca: critérios práticos para o clínico

A terapia de ressincronização cardíaca é uma alternativa eficaz em pacientes com insuficiência cardíaca e dessincronia, podendo reduzir significativamente a morbimortalidade. Apesar de haver indicações bem estabelecidas, cerca de um terço dos pacientes não responde à terapia; assim, a busca po...

Cardiopulmonary exercise testing in patients with left bundle branch block and preserved ejection fraction

BACKGROUND: Left bundle branch block (LBBB) has prognostic significance in patients with congestive heart failure. However, its influence is not well established in patients with preserved systolic ventricular function. OBJECTIVE: To evaluate the implications of LBBB presence in the cardiovascular perfor...

Relação entre ecocardiografia e cineangiocoronariografia em pacientes diagnosticados com síndrome coronariana aguda. Estudo retrospectivo

OBJETIVO: Reconhecer a relação ecocardiográfica e cineangiocoronariográfica no acometimento coronário que leva à disfunção miocárdica. MÉTODOS: Estudo observacional retrospectivo descritivo, que buscou apresentar o perfil clínico e epidemiológico de pacientes em uma instituição pública/pri...

Importance of SERCA2a on early isolated diastolic dysfunction induced by supravalvular aortic stenosis in rats

Braz. j. med. biol. res; 50 (5), 2017
Cardiac remodeling is defined as changes in shape and function of the heart in response to aggression (pressure overload). The sarcoplasmic reticulum calcium ATPase cardiac isoform 2a (SERCA2a) is a known factor that influences function. A wide spectrum of studies report a decrease in SERCA2a in heart fa...

Strain auricular izquierdo y biomarcadores cardíacos como predictores de accidente cerebrovascular en pacientes con fibrilación auricular de reciente comienzo

Rev. chil. cardiol; 36 (2), 2017
Introducción: La miopatía y fibrosis auricular representan el sustrato protrombótico y proarrítmico en pacientes con fibrilación auricular (FA). Estudios recientes muestran relación entre el strain auricular izquierdo (SAI), eventos cardiovasculares y recurrencia en pacientes con FA. La asociación...

Relationship between ventilation heterogeneity and exercise intolerance in adults with sickle cell anemia

Braz. j. med. biol. res; 50 (8), 2017
Sickle cell anemia (SCA) causes dysfunction of multiple organs, with pulmonary involvement as a major cause of mortality. Recently, there has been growing interest in the nitrogen single-breath washout (N2SBW) test, which is able to detect ventilation heterogeneity and small airway disease when the resul...

Resistance training attenuates salt overload-induced cardiac remodeling and diastolic dysfunction in normotensive rats

Braz. j. med. biol. res; 50 (9), 2017
Elevated salt intake induces changes in the extracellular matrix collagen, leading to myocardial stiffness and impaired relaxation. Resistance training (RT) has been used as a remarkably successful strategy in the treatment of heart disease. Therefore, the aim of this study was to investigate the effects...

Insuficiencia aórtica sistólica: un fenómeno singular

Rev. chil. cardiol; 36 (2), 2017
La insuficiencia aórtica consiste en el reflujo diastólico de sangre desde la aorta hacia el ventrículo izquierdo, sus mecanismos son múltiples y su magnitud queda determinada por: el área del orificio regurgitante, el gradiente diastólico entre la aorta y el ventrículo izquierdo y la duración de...

Válvula aórtica cuadricúspide: caso clínico y discusión

Rev. chil. cardiol; 36 (2), 2017
The quadricuspid aortic valve is a rare congenital anomaly, usually presenting as an isolated malformation causing aortic regurgitation in the faith or sixth decades of life. The first reported cases were found at autopsy or became evident by surgical findings. However, the emergence of new imaging modal...

Fibrosis endomiocárdica crónica: reporte de caso en área no endémica

Rev. chil. cardiol; 36 (2), 2017
Endomyocardial fibrosis is a known and prevalent cause of restrictive cardiomyopathy in countries of Equatorial Africa, but very rare elsewhere. Although the diagnosis in endemic countries is established by the presence of certain echocardiographic criteria, the gold standard is the endomyocardial biopsy...