左心室后乳头肌起源室性心律失常:心电图特点和导管消融效果

摘要

Objective To investigate the clinical characteristics, electrocardiography, electrophysiological features and the eff ectiveness of catheter ablation of ventricular arrhythmias originating from left ventricle posterior papillary muscles. Methods Clinical features and electrocardiography of 16 patients with ventricular arrhythmias arising from left ventricular posterior papillary muscles underwent catheter ablation were retrospectively analyzed. Activation mapping and/or pace mapping were performed to identify the site of origin and transthoracic echocardiography were used to demonstrate ablation catheter position and contact. The immediate success and recurrence rates were evaluated. Results During arrhythmias, QRS wave duration of 16 patients [5 men, mean age (45.0±18.2) years] was (155.1±9.0)ms. The prevalence of R>r' and rr'6例(6/16)和r