问：什么是宽QRS心动过速？答：心电图上QRS波时限≥120ms的心动过速称为宽QRS心动过速。它包括了多种发病机理与治疗原则不相同的心动过速。根据激动的起源可分为室上性和室性心动过速两类。根据有无旁道的前向传导亦可分两类：无旁道的宽QRS心动过速（室速、室上速合并快频率依赖性束支传导阻滞、原有束支传导阻滞）；预激综合征以Kent束或Ma-haim纤维作旁道的前向传导合并室上速或房扑、房颤。 Q: What is wide QRS tachycardia? A: ECG QRS wave duration of ≥ 120ms tachycardia known as wide QRS tachycardia. It includes a variety of pathogenesis and treatment principles are not the same tachycardia. According to the origin of excitement can be divided into supraventricular and ventricular tachycardia two categories. According to the presence or absence of anterior conduction can also be divided into two categories: wide bypass without QRS tachycardia (VT, supraventricular tachycardia fast-dependent bundle branch block, the original bundle branch block) ; Wolff-Parkinson’s syndrome with Kent beam or Ma-haim fibers as a bypass of the forward conduction combined with supraventricular tachycardia or atrial flutter, atrial fibrillation.