预激综合征临床心电图1964年Sears 和1965年 Chung 统计报道占医院总数0.21%。间歇性预激综合征1968年 Beckmun及 Lamb 曾对128名预激患者应用 Holtdr 监护5～28年其中发现者占47%,而交替性WPW 至今尚少报道,在1973年 Halpern 等报道在一例预激患者进行希氏囊电图检查中,应用程序刺激记录中开始5个室上刺激发生3个2:1的 Kent 阻滞图形,随后随刺激频率变快又转为交替性文氏阻滞图形,并认为在预激征侯群中阻滞区可在同一部位二 Pre-excitation syndrome clinical ECG Sears in 1964 and Chung statistics in 1965 accounted for 0.21% of the total number of hospitals. Intermittent WPW syndrome Beckman and Lamb in 1968 had 128 pre-excitation patients with Holtdr custody 5 to 28 years, of which 47% were found, and alternative WPW is still seldom reported in 1973 Halpern et al reported in an example of pre- Excitement patients underwent a Maxwell’s EKG examination. Five of the 2: 1 Kent block images were initiated in the application of stimulus recordings and then switched to alterna- tive Venn retardation patterns as the stimulus frequency increased , And that in the pre-excitation block group block in the same area can be two