Abstract
Background: The role of QT interval dispersion (QTD) in heart failure (HF) remains poorly defined and controversial. Our objective was to evaluate the impact of QTD in the clinical evolution of chronic HF patients under control due to the use of carvedilol (CVD). Methods: We selected 108 patients (22-82 years), 65.7% were male, 72.2% caucasians, with stable chronic HF and NYHA functional class (FC) II, III and IV on optimized treatment, with an left ventricle ejection fraction (LVEF) of ≤0.40 for therapy with CVD.
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