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一例42岁、男性预激综合征患者,从28岁起心动过速反复发作。1981年5月27日因心动过速发作药物治疗无效而进行快速心房起搏。心房起搏期间心房起搏率和心室率均增加到240次/分(自发心动过速期间心房率为222次/分).可是当心房起搏率从240次/分下降到210次/分时,原来的心动过速
A 42-year-old male with WPW syndrome, recurrent tachycardia from 28 years of age. May 27, 1981 due to tachycardia drug treatment and rapid atrial pacing. During atrial pacing, the atrial pacing rate and ventricular rate increased to 240 beats / min (spontaneous tachycardia during atrial rate of 222 beats / min). However, when the atrial pacing rate decreased from 240 beats / min to 210 beats / min When the original tachycardia