患者,男,29岁,工人。主因反复发作室速2年余。晕厥2次于1989年1月28日再次入院。2年前於乘车时突发心悸、眩晕。心电图检查示室速,QRS为左束支阻滞,转复窦律后呈左前分支阻滞;Tv_1～V_4倒置。超声心动图检查:(1)右室基底段扩大,右室心尖段圆钝,呈袋状,袋内直径约2cm,右室收缩活动减弱;三尖瓣不增厚,开放不 Patient, male, 29 years old, worker. Mainly because of repeated stuttering more than 2 years. Syncope twice in January 28, 1989 again hospitalized. 2 years ago sudden heart palpitations, dizziness. Electrocardiogram showed ventricular tachycardia, QRS left bundle branch block, sinus rhythm was reversed after the left anterior branch block; Tv_1 ~ V_4 inversion. Echocardiography: (1) enlargement of the right ventricular base, right ventricular apex obtuse, bag-like bag diameter of about 2cm, decreased right ventricular contractility; tricuspid valve is not thick, open not