Evaluation of QRS dispersion and its association withtachyarrhythmia events in patients with implantedcardiac resynchronization therapy defibrillator device

Introduction: Heart failure (HF) is one of the major problems of health system in the countries. In a subgroup of these patients, cardiac resynchronization therapy defibrillator (CRT-D) improves the quality of life by enhancing the function of the left ventricle (LV) and preventing of arrhythmias. The present study intends to discuss the effect of CRT-D on the QRS dispersion, as a predisposing factor to arrhythmias. Methods: 45 patients treated...