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典型的室上速与室速极易诊断,但室上速伴心室内差异传导时,QRS波畸形增宽,易与室速混淆。作者复习了已有诊断室速的标准:(1)额面 QRS平均心电轴左偏;(2)房室分离存在;(3)QRS 波时限>0.14秒;(4)胸导联QRS波呈左束支或右束支阻滞型,但认为这四项标准对鉴别室上速与室速有一定的局限性。并结合原有标准采用以下两点(1)任何一胸导联是否出现RS型 QRS波;(2)若出现 RS型 QRS波,测量从R波起点至S波顶端间的时间,对经电生理检查确定诊断的554例宽 QRS形心动过速12导联心电图逐一进行分析,从中寻求鉴别室速与
Typical superficial velocity and ventricular velocity can be easily diagnosed, but supraventricular tachycardia with ventricular differential conduction, QRS wave deformity widened, easily confused with VT. The authors reviewed the criteria for the diagnosis of VT: (1) left frontal QRS mean QRV; (2) atrioventricular separation; (3) QRS wave duration> 0.14 second; (4) chest lead QRS wave Was left bundle branch or right bundle branch block type, but that these four criteria on the identification of supraventricular tachycardia and ventricular tachycardia have some limitations. And combined with the original standard using the following two points (1) whether any one lead chest QRS QRS wave; (2) if there is RS-type QRS wave, measuring the time from the beginning of R wave to the top of the S wave, Physiological examination to determine the diagnosis of 554 cases wide QRS tachycardia 12-lead ECG one by one analysis, from which to seek identification of VT and