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预激综合征(以下简称预激)的发生率占总人口的0.15～0.2%,其40～80%并发心动过速。心动过速发作持续时间长者可产生低心排血量、心衰,严重者甚至发生晕厥、猝死。心电图诊断房室旁道的阳性率仅为0.1～3.1‰,且随年龄增长而降低。预激的心脏电生理检查
Pre-excitation syndrome (hereinafter referred to as the pre-excitation) the incidence of the total population of 0.15 to 0.2%, 40 to 80% of its tachycardia. The duration of tachycardia episodes in elderly people can produce low cardiac output, heart failure, severe cases or even syncope and sudden death. The positive rate of atrioventricular anomalies diagnosed by ECG is only 0.1 ~ 3.1 ‰, and decreases with age. Pre-excited cardiac electrophysiology examination