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The presence of complete left bundle branch block (LBBB) in patients with cong estive heart failure has been proposed to be a factor that negatively affects le ft ventricular(LV) systolic function. The aim of this study was to evaluate the relative predictive value of QRS dispersion(QRSD) and QRS duration (QRSd) in rel ation to systolic performance of the left ventricle. The ejection fraction of 13 0 consecutive patients with LBBB was evaluated by standard echocardiographic met hods, whereas QRSd and QRSD were measured. It was demonstrated that QRSD in pati ents with complete LBBB is strongly related to LV contractility. We, therefore, suggest that this simple electrocardiographic index may serve as a useful screening test for detection of patients with LV systolic dysfunction.
The presence of complete left bundle branch block (LBBB) in patients with cong estive heart failure has been to be a factor that negatively affects le ft ventricular (LV) systolic function. The aim of this study was to evaluate the relative predictive value of QRS dispersion (QRSD) and QRS duration (QRSd) in rel ation to systolic performance of the left ventricle. The ejection fraction of 13 0 consecutive patients with LBBB was evaluated by standard echocardiographic met hods, while QRSd and QRSD were measured. that QRSD in pati ents with complete LBBB is strongly related to LV contractility. We, therefore, suggest that this simple electrocardiographic index may serve as a useful screening test for detection of patients with LV systolic dysfunction.