Evaluation of left ventricular morphology and function related to complete left bundle branch block with cardiac magnetic resonance in patients with systolic heart failure / 中国介入心脏病学杂志

ABSTRACT

Objective To evaluate the left ventricular morphology and function related to complete left bundle branch block(CLBBB)in patients with systolic heart failure with cardiac magnetic resonance.Methods Thirteen consecutive patients with left ventricular ejection fraction(LVEF)＜50％evaluated by echocardiography and CLBBB were included as the study group,and patients with other reasons leading to heart failure were excluded.During At the same period,patients with primary dilated cardiomyopathy were selected as the control group(n=19)whose age,sex and LVEF were matched with the study group.All patients received contrast magnetic resonance imaging examination.Results Left ventricular end-diastolic volume(LVEDV)in patients with CLBBB was(173.8±23.1)ml and left ventricular end-systolic volume(LVESV)was(123.1±18.7)ml,while LVEDV in patients without CLBBB was(247.9±60.7)ml and LVESV was(188.2±57.1)ml respectively.All LV measurements/indexes were smaller in patient with CLBBB when compared to the control(all P＞0.05).Right atrium area was also smaller in CLBBB patients(P=0.037).The maximal wall thickness in the patients with CLBBB [(8.3±1.4)mm] was thicker than that in the patients without CLBBB[(7.2±1.1)mm](P=0.016).Conclusions CLBBB may play an important role in the progress of heart failure and LV dilation may not have similar significant contribution with relative thicker ventricular wall.