在III度房室传导阻滞中约有30%伴有室性时相性窦性心律不齐,即包含有QRS波群的P-P间期较不包含有QRS波群的P—P间期为短。但如同时伴有P波形态改变,则易误诊为房性异位搏动,现将所遇一例报道如下。临床及心电图资料患者女性,39岁。1965年患“风湿性关节炎”。1971年患“风湿性心肌炎”,当时心电图为“不完全性右束支传导阻滞”。1972年心电图示完全性右束支传导阻滞。1974年进展 In III degree atrioventricular block about 30% with ventricular phase sinus arrhythmia, that is, including the QRS wave group PP interval QRS wave group does not contain the P-P interval is shorter . However, if accompanied by changes in P wave morphology, it is often misdiagnosed as atrial ectopic beats, the case will now be reported as follows. Clinical and ECG data Female, 39 years old. 1965 suffering from “rheumatoid arthritis.” 1971 suffering from “rheumatic myocarditis,” when the ECG as “incomplete right bundle branch block.” 1972 ECG complete right bundle branch block. Progress in 1974