The effect of complete left bundle branch block on left ventricular radial dyssynchrony and rotation and twist

VernacularTitle:完全性左束支传导阻滞对左心室内同步性及扭转的影响
Author: Yanjuan ZHANG ; Di XU ; Jing YAO ; Hongping WU ; Bing XIE
Publication Type:Journal Article
Keywords: Echocardiography; Bundle-branch block; Ventricular function,left; Speckle tracking imaging
From: Chinese Journal of Ultrasonography 2012;21(5):369-372
CountryChina
Language:Chinese
Abstract: ObjectiveTo investigate left ventricular (LV) radial dyssynchrony and LV rotational change of isolated complete left bundle branch block (CLBBB) and CLBBB with heart failure (HF).Methods Twenty-six isolated CLBBB patients,twenty-four CLBBB patients with HF and twenty healthy controls were studied.Two-dimensional speckle tracking imaging (2D-STI) was applied to short-axis views to calculate LV radial dyssynchrony and LV rotational and twist degree and time to peak rotational and twist degree.ResultsLV radial dyssynchrony and LV rotation and twist degree were intermediately damaged in isolated CLBBB patients and was significantly damaged in CLBBB patients with HF,compared with healthy controls.ConclusionsFor isolated CLBBB patients,even if LV ejection fraction was in the normal range,another parameters of cardiac mechanic had changed and 2DSTI could be used to evaluate these alterations.