Zv_1、Zv_5导联心室晚电位的检出率及临床意义

Study on electrophyslologic properties of atrium In patients with paroxysmal atrial fibrillation by means of trans- csophageal atrial pacing technique

用X、Y、Z正交导联和改良的Zv_1、Zv_5导联,对38例室性早搏病人进行心室晚电位检测.结果显示Zv_1、Zv_2导联法晚电位阳性率明显高于X、Y、Z正交导联法(u=4.69,P<0.01).改进、弥补了X、Y、Z正文导联对晚电位“稀释”的不足.用DCG同时记录,发现Zv_1导联法晚电位阳性与右室起源的早搏有关;Zv_5导联法记录的晚电位与左室起源的早搏有关.显示改良的Zv_1、Zv_5导联与传统的X、Y、Z导联检测法的互补作用,且可初步判断晚电位起源于左室或右室,对估计病变的位置、性质和程度有一定的临床意义.

Electrophysiologic studies were condacted in 20 pnticnts with paroxysmal at rial fibrillation Ai hy mtans of f trans esophageal atrial paring technique. Twenty normal Mihicets .served as control group. The results iridieated that in patients with paroxysmal atrinl fibrillation, effective refractory period shortened . relative rcfnietory period lengthened, and inlet a trial conduction prominently delayrd. These abnormalities might he the fundamental rhnngcs in patients with ntrial fibril lauon This article suggests that transrsophageal atrial pacing may ho partial substitute for iritracnntifir elet trophy siologic examination.