患者男性,70岁,临床诊断:冠心病,曾多次发生左心衰竭。1990年9月7日因突发急性前壁心肌梗塞入院。血清酶学检查符合 AMI 演变。心电图(附图 A 上、中行)为窦性心律,心率97次/min,P-R0.20s,QRS 时限0.08s,ST-T 为早期 AMI 改变,V_2、V_3QRS 振幅呈渐小或渐大现象,V_4呈 qRs→rSr~1s~1型,每隔2次心搏交替1次,酷似 QRS 波群的尖端扭转。发病后4h 心前 Male patient, 70 years old, clinical diagnosis: coronary heart disease, had multiple left heart failure. September 7, 1990 due to sudden onset of anterior myocardial infarction admission. Serum enzyme tests consistent with AMI evolution. The electrocardiogram (A, B) was sinus rhythm with heart rate 97 beats / min, P-R 0.20s, QRS duration 0.08s, ST-T was early AMI changes, V_2, V_3QRS amplitude was gradually smaller or larger , V_4 was qRs → rSr ~ 1s ~ 1 type, alternating once every two heartbeats, resembles the tip of QRS complex torsion. 4h after onset of heart