患者男性,13岁。自幼疑有先天性心脏病。1980年11月3日因突然心悸、咳嗽、紫绀2小时急诊入院。右心导管造影诊断:右旋心、大血管转位、单心室畸形。次日心电图(图1,见第239页,后同)示:窦性心律、右房扩大。交替出现畸形、宽大的QRS波群有2种可能:1.室性早搏二联律;2.交替性预激综合征。1980年11月23日(图2)示:各导联宽大畸形的QRS波群之前有P波,P—P间期固定为0.08秒,有 Patient male, 13 years old. Childhood suspected congenital heart disease. November 3, 1980 due to sudden heart palpitations, cough, cyanosis 2 hours emergency admission. Right heart catheterization diagnosis: right heart, large vessel transposition, single ventricular deformity. The next day electrocardiogram (Figure 1, see page 239, the same below) shows: sinus rhythm, right atrial enlargement. Alternate deformity, large QRS complex there are two possible: 1. Premature ventricular premature beats; 2. Alternating pre-excitation syndrome. November 23, 1980 (Figure 2) shows: P wave before the QRS complex of each lead, the P-P interval is fixed at 0.08 seconds, there are