Gavrilescu S, Luca C
Acta Cardiol. 1976;31(4):339-41.
A case with complete A-V heart block in whom retrograde P- waves following some of the ventricular complexes were due to an ectopic junctional activity with the characteristics of parasystole is reported. His bundle electrogram showed an infrahisian block. After administration of 1 mg atropine intravenously the retrograde P- waves were detached from the ventricular automatic complexes and an H' deflection preceded each inverted P- wave with an H'-A' interval of 40 msec.
报告了一例完全性房室传导阻滞患者，其部分室性复合波后的逆行P波归因于具有并行心律特征的异位交界性活动。希氏束电图显示希氏束以下阻滞。静脉注射1毫克阿托品后，逆行P波与室性自主复合波分离，每个倒置的P波之前有一个H’波，H’-A’间期为40毫秒。
