Results: 61

Factores asociados a bajo gradiente en estenosis aórtica severa con fracción de eyección preservada

Rev. chil. cardiol; 36 (2), 2017
Introducción: La estenosis aórtica es frecuente en países desarrollados, cuando es severa (EAS) y sintomática se recomienda reemplazo valvular. Su diagnóstico ecocardiográfico se realiza con cualquiera de; área valvular aórtica (AVA) <1.0 cm², gradiente medio (GM) >40 mmHg, velocidad máxima ...

Influence of Angiotensin-Converting-Enzyme Gene Polymorphism on Echocardiographic Data of Patients with Ischemic Heart Failure

Arq. bras. cardiol; 107 (5), 2016
Abstract Background: Association between angiotensin-converting-enzyme (ACE) gene polymorphisms and different clinical and echocardiographic outcomes has been described in patients with heart failure (HF) and coronary artery disease. Studying the genetic profile of the local population with both disease...

Atrial Strain and Strain Rate: A Novel Method for the Evaluation of Atrial Stunning

Arq. bras. cardiol; 107 (4), 2016
Abstract Background: Atrial fibrillation (AF) is the most common arrhythmia seen in adults. Atrial stunning is defined as the temporary mechanical dysfunction of the atrial appendage developing after AF has returned to sinus rhythm (SR). Objectives: We aimed to evaluate atrial contractile functions by ...

Assessment of the left ventricular function in normotensive prediabetics: a tissue Doppler echocardiography study

ABSTRACT Objective Several studies have shown that left ventricular (LV) dysfunction is increased in individuals with diabetes. However, there are scarce data about LV function in prediabetics. This study assessed the early changes in LV diastolic and systolic myocardial function in normotensive predia...

Fractal Dimension in Quantifying Experimental-Pulmonary-Hypertension-Induced Cardiac Dysfunction in Rats

Arq. bras. cardiol; 107 (1), 2016
Abstract Background: Right-sided heart failure has high morbidity and mortality, and may be caused by pulmonary arterial hypertension. Fractal dimension is a differentiated and innovative method used in histological evaluations that allows the characterization of irregular and complex structures and the...

Contractilidad ventricular: fisiología y proyección clínica

Rev. méd. Chile; 144 (6), 2016
The contractile state of the heart is the result of myocardial contractility, the intrinsic mechanism that regulates the force and the shortening of the ventricle and determines the ventricular ejection volume. However, the ejection volume is also modulated by ventricular preload (diastolic ventricular v...

Functional Class in Children with Idiopathic Dilated Cardiomyopathy. A pilot Study

Arq. bras. cardiol; 106 (6), 2016
Abstract Background: Idiopathic dilated cardiomyopathy (IDCM), most common cardiac cause of pediatric deaths, mortality descriptor: a low left ventricular ejection fraction (LVEF) and low functional capacity (FC). FC is never self reported by children. Objective: The aims of this study were (i) To eval...

Effect of Nebivolol on MIBG Parameters and Exercise in Heart Failure with Normal Ejection Fraction

Arq. bras. cardiol; 106 (5), 2016
Abstract Background: More than 50% of the patients with heart failure have normal ejection fraction (HFNEF). Iodine-123 metaiodobenzylguanidine (123I-MIBG) scintigraphy and cardiopulmonary exercise test (CPET) are prognostic markers in HFNEF. Nebivolol is a beta-blocker with vasodilating properties. Ob...

Experimental validation of a cardiac simulator for in vitro evaluation of prosthetic heart valves

Abstract Objective: This work describes the experimental validation of a cardiac simulator for three heart rates (60, 80 and 100 beats per minute), under physiological conditions, as a suitable environment for prosthetic heart valves testing in the mitral or aortic position. Methods: In the experiment,...

Aerobic Training after Myocardial Infarction: Remodeling Evaluated by Cardiac Magnetic Resonance

Arq. bras. cardiol; 106 (4), 2016
Abstract Background: Numerous studies show the benefits of exercise training after myocardial infarction (MI). Nevertheless, the effects on function and remodeling are still controversial. Objectives: To evaluate, in patients after (MI), the effects of aerobic exercise of moderate intensity on ventricu...