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交替性文氏周期分为A型、B型.前者指传导系统近端2:1阻滞,远端文氏现象,以4:1阻滞而终止;后者指近端文氏现象,远端2:l阻滞,以3:1或2:1阻滞而终止.多发生在房室交界处,而出现在束支内则少见且预后差,现报告左束支内A型、右束支内B型交替性文氏周期各1例.1 病例摘要例l,患者男性,65岁,临床诊断:冠心病.V_(1)导联P-P间期0.64s,在房室2:1阻滞基础上,QRS波有规律地演变:完全性
Alternating Wen’s cycle is divided into type A, type B. The former refers to the proximal 2: 1 conduction system block, distal Wen’s phenomenon, with a 4: 1 block and termination; the latter refers to the proximal Wen’s phenomenon, far End 2: l block, with 3: 1 or 2: 1 block and termination. Occurred at the junction of atrioventricular, but in the bundle branch is rare and the prognosis is poor, it is reported that the left bundle branch A type, right B-type bronchial branches within the alternating cycle of 1 cases of cases .1 case summary of patients l, male, 65 years old, clinical diagnosis: coronary heart disease .V_ (1) lead PP interval 0.64s, in the atrioventricular 2: 1 Based on the block, the QRS wave evolves regularly: completeness