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| Ultrasound study of ventricular synchronicity in patients with ischemic cardiomyopathy accompanied with complete left bundle branch block |
Department of Cardiology, Wenzhou Central Hospital, Wenzhou, 325000
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| Cite this article: |
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YANG Licui,WANG Kaihua,HUANG Xumei, et al. Ultrasound study of ventricular synchronicity in patients with ischemic cardiomyopathy accompanied with complete left bundle branch block[J]. JOURNAL OF WEZHOU MEDICAL UNIVERSITY, 2014, 44(11): 800-803.
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Abstract Objective: To identify the difference of left ventricular and interventricular synchronicity found on echocardiogram between patients with ischemic cardiomyopathy (ICM) accompanied with complete left bundle branch block (CLBBB) and those with isolated left bundle branch block. Methods: Thirty-two patients with ICM accompanied with CLBBB (the study group) and 30 patients with isolated left bundle branch block (the control group) were enrolled. The standard deviation of systolic peak time (Ts-SD) in 12 segments along the long axis of left ventricular motion, including the left ventricular septal, the lateral wall, the anterior wall, the inferior wall, the posterior wall of basal segment and the middle segment were evaluated by quantitative tissue velocity imaging (QTVI). The septal-to-posterior wall motion delay (SPWMD) in parasternal long axis was assessed by M-mode echocardiogram. The interventricular mechanical delay (IVMD) of left and right ventricle was measured by pulse Doppler. Results: Compared with the control group, Ts-SD, SPWMD and IVMD in the study group were increased significantly (P<0.001). The results of linear correlation analysis indicated that the left ventricular and interventricular synchronicity was positively correlated with the size of ventricle, the width of QRS wave and N terminal pro brain natriuretic peptide (NT-proBNP). Conclusion: Patients with ICM accompanied with CLBBB have obvious left ventricular and interventricular dyssynchrony. Echocardiogram is valuable in the assessment of ventricular dyssynchrony.
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Received: 28 May 2014
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2014, Vol. 44 
