The synchrony evaluation of atrial in patients with complete left bundle branch block by using tissue Doppler imaging

doi:10.3969/j.issn.1672-5301.2017.12.014

Abstract：Objective To evaluate the patients of complete left bundle branch block (CLBBB) with or without heart failure in synchrony of atrial by using tissue Doppler imaging.Methods 30 patients with CLBBB admitted from Meitan General Hospital were divided into two groups according to patients with or without heart failure.Group Ⅰ:sixteen CLBBB patients without heart failure(LVEF＞50％);group Ⅱ:fourteen CLBBB patients with heart failure (LVEF＜50％);control group:twenty healthy adults.The echocardiography images and the function of tissue velocity imaging in all the subjects were obtained and analyzed.The QTVI of the left atrial free wall,interatrial septum and right atrial free wall were observed in the apical four-chamber.As to assess the synchronicity of atrial,the time from the beginning of p to peak late diastolic velocity (Ta) and the time of absolute difference between L-Ta and IAS-Ta,between IAS-Ta and R-Ta,between L-Ta and R-Ta were measured.Results L-TA and IAS-Ta of group Ⅱ has longer time than control group and group Ⅰ (P＜0.01,P＜0.01).The asynchronism of right Inter-atrial synchronicity was increased in group Ⅱ (P＜0.01).Meanwhile the asynchronism of left Inter-and Intra-atrial synchronicity was increased in group Ⅱ compared with control group (P＜0.05,P＜0.05),but the parameters had no significant statistics in group Ⅰ.Conclusion The patients of CLBBB with heart failure can cause inter-atrial asynchronism and intra-atrial asynchronism.