以往将慢性反复性房性心动过速(IART)分为两种类型:一种是窦性周期进行性缩短,达到某临界值时,由一个P-R不延长的窦性P波诱发一阵房性心动过速(房速);另一种是窦性周期进行性延长,达到临界值时诱发房速。本文报告3例均为每阵房速中止后经过一段较长的间歇,出现1个窦P,后再发作房速,周而复始,病程为慢性经过。这是IART的一种特殊类型,笔者称之为慢性反复性房速-窦P-房速节律。 In the past the chronic recurrent atrial tachycardia (IART) is divided into two types: one is the progressive shortening of the sinus cycle, to reach a critical value, by a prolonged sinus P wave of PR induced atrial heart beating Overdrive (atrial tachycardia); the other is the sinusoidal prolongation, when the critical value to induce atrial tachycardia. This article reports three cases are each burst after a long stop after a long interval, there is a sinus P, and then the onset of atrial tachycardia, and again and again, the course of chronic. This is a special type of IART, which I refer to as chronic recurrent atrial tachycardia - sinus p-tachycardia.