在遇到宽大或异常QRS形态的,有规律的心动过速时,必须区别室上性心动过速合并差异传导和室性心动过速。通常认为增加心脏迷走神经活动能终止或减慢室上性心动过速,但对室性心动过速的心室率无影响。当按摩颈动脉窦合用盐酸艾亩 In the face of large or abnormal QRS morphology, regular tachycardia, you must distinguish between supraventricular tachycardia with differential conduction and ventricular tachycardia. It is generally accepted that increasing cardiac vagal activity can terminate or slow supraventricular tachycardia but has no effect on ventricular rate of ventricular tachycardia. When massage carotid sinus combined with acne hydrochloride