患者李××,女,15岁。自觉心慌闷气、头晕呈阵发性发作;在描记心电图时出现扭转型室速——心跳骤停。心电图特征:心动过速时,P 波消失,心室率为218次/分,QRS 波宽大畸形>0.12秒,R 粗钝,主波方向每隔4～13个心动周期围绕以等电位线骤然呈现尖端上下扭转的特异现象,反复出现约18分钟.心脏骤停时,心电图呈一接线,6分钟后出现窦性心动过速,伴Ⅱ°2:1房室传导阻滞室内阻滞,逐渐好转,前一半为窦性心动过速2:1下传,心率107次/分,后一半转成非阵发性房性心动 Patient Lee × ×, female, 15 years old. Consciously panicked, dizziness was paroxysmal episodes; in the tracing of ECG torsion VT - cardiac arrest. ECG characteristics: tachycardia, P wave disappeared, the ventricular rate was 218 beats / min, QRS wave large deformity> 0.12 seconds, R dull, the main wave direction every 4 to 13 cardiac cycles around the equipotential line suddenly presented Twisted up and down the tip of the phenomenon, repeated about 18 minutes .A cardiac arrest, the ECG was a wiring, sinus tachycardia after 6 minutes, with Ⅱ ° 2: 1 atrioventricular block, and gradually improved , The first half of sinus tachycardia 2: 1 downlink, heart rate 107 beats / min, the latter half into non-paroxysmal atrial cardiomyopathy