Results: 30

Quando a ressonância magnética importa para a avaliação das cardiopatias

A ressonância magnética cardíaca (RMC) é uma modalidade de imagem não invasiva capaz de fornecer informações precisas e, muitas vezes, únicas na investigação de cardiopatias em geral e, em especial, nas cardiomiopatias. A capacidade de caracterizar precisamente o miocárdio do ponto de vista de...

Métodos de avaliação da perfusão miocárdica

A doença arterial coronariana é altamente prevalente. A caracterização anatômica apenas não é suficiente para determinar o grau de isquemia que uma estenose acarreta, especialmente nos momentos de demanda aumentada. Os métodos de avaliação da perfusão miocárdica permitem caracterizar a reperc...

Elevated Heart Rate is Associated with Cardiac Denervation in Patients with Heart Failure: A 123-Iodine-MIBG Myocardial Scintigraphy Study

Arq. bras. cardiol; 107 (5), 2016
Abstract Background: In the Systolic Heart Failure Treatment With the If Inhibitor Ivabradine Trial (SHIFT), heart rate (HR) reduction with ivabradine was associated with improved survival and reduced hospitalizations in patients with heart failure (HF). The mechanisms by which elevated HR increases mor...

Cardiac Magnetic Resonance-Verified Myocardial Fibrosis in Chagas Disease: Clinical Correlates and Risk Stratification

Arq. bras. cardiol; 107 (5), 2016
Abstract Background: Chagas disease (CD) is an important cause of heart failure and mortality, mainly in Latin America. This study evaluated the morphological and functional characteristics of the heart as well the extent of myocardial fibrosis (MF) in patients with CD by cardiac magnetic resonance (CMR...

Preclinical molecular imaging: development of instrumentation for translational research with small laboratory animals

Einstein (Säo Paulo); 14 (3), 2016
ABSTRACT Objective: To present the result of upgrading a clinical gamma-camera to be used to obtain in vivo tomographic images of small animal organs, and its application to register cardiac, renal and neurological images. Methods: An updated version of the miniSPECT upgrading device was built, which i...

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...

Marfan Syndrome: new diagnostic criteria, same anesthesia care? Case report and review

Rev. bras. anestesiol; 66 (4), 2016
Abstract Background: Marfan's Syndrome (MFS) is a disorder of connective tissue, mainly involving the cardiovascular, musculoskeletal, and ocular systems. The most severe problems include aortic root dilatation and dissection. Anesthetic management is vital for the improvement on perioperative morbidity...

Utilidad de la imagen en multi-modalidad para el diagnóstico diferencial de las masas cardíacas

Rev. chil. cardiol; 35 (1), 2016
Introducción: El presente trabajo es un estudio descriptivo de una serie de casos con masas cardíacas cuyo estudio involucró múltiples modalidades de imagen no invasiva, incluyendo Ecocardiograma (ECO), Tomografía Axial Computada Cardíaca (TAC), PET/CT (Tomografía de Emisión de Positrones) y Reso...

Bioamplificador multicanal para la adquisición de la señal ECGAR, del prototipo DIGICARDIAC
Multichannel bioamplifier for ECGAR signal acquisition, DIGICARDIAC prototype

Rev. Inst. Nac. Hig; 45 (2), 2014
El prototipo DIGICARDIAC es un instrumento de uso médico que permite la adquisición simultánea de las doce derivaciones del electrocardiograma (ECG) estándar, con características de alta resolución (ECGAR). El presente trabajo reporta el desarrollo de la etapa de amplificación multicanal implement...

Desarrollo del prototipo de un sistema de adquisición de datos para la digitalización de la señal electrocardiográfica de alta resolución
Prototype development of a data acquisition system for ECG signal digitalization high resolution

Rev. Inst. Nac. Hig; 43 (2), 2012
Resumen - El presente trabajo reporta el desarrollo de una tarjeta de adquisición de datos para uso biomédico. El proyecto consta de una etapa de hardware y una de software. La etapa de hardware permite la digitalización multicanal de 8 señales, con una velocidad de adquisición de 2000 muestras por ...