本文所讨论的几种心律失常对血液动力学影响较大,或具有更严重的潜在危险性,临床上需及时处理,但其治疗原则往往不同而又容易混淆,故在此讨论其鉴别诊断.一、心房颤动时心室内差异性传导心搏与室性早搏的鉴别房颤时心室律极不规则,心动周期常呈长一短周期,可伴发心室内差异性传导,出现畸形的QRS Several arrhythmias discussed in this article have a greater impact on hemodynamics, or have a more serious potential risk, the need for timely clinical treatment, but the treatment is often different but easy to confuse the principles, so here to discuss the differential diagnosis. First, when atrial fibrillation ventricular conduction differences between ventricular premature ventricular differentiation and atrial fibrillation very irregular ventricular rhythm, cardiac cycle often long one short cycle, may be associated with ventricular differential conduction, the emergence of malformed QRS