患者 ,女 ,72岁。因反复劳累后胸闷、气促 1 0个月余就诊。体检 :心率 96次 /min ,血压 1 35 /80mmHg( 1mmHg=0 .1 33kPa) ,心界向左下扩大 ,心前区可闻及Ⅲ级收缩期杂音 ,双下肢轻度水肿。心电图 (图 1 )示①窦性心律 ( 89次 /min) ,②完全性左束支传导阻滞 (CLBBB) ,③心肌劳 Patient, female, 72 years old. After repeated tired chest tightness, shortness of breath more than 10 months of treatment. Physical examination: heart rate 96 beats / min, blood pressure 1 35 / 80mmHg (1mmHg = 0 .1 33kPa), the heart bound to the left to expand the anterior plaque can be heard and Ⅲ systolic murmur, mild lower extremity edema. Electrocardiogram (Figure 1) showed ① sinus rhythm (89 beats / min), ② complete left bundle branch block (CLBBB), ③ myocardial labor