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患者男,65岁。以心慌闷气3天于1989年3月入院。临床诊断:“冠心病心律失常”。入院后心电图示:P波形态正常,P-P间期为0.90秒,P_1-R间期为0.19秒,P_2-R间期突然成倍延长为0.48秒,P_3未下传,呈规律的3∶2传导。(见附图) 心电图诊断:Ⅱ°房室传导阻滞,不典型文氏现象。讨论:房室结双径路传导是致不典型文氏现象的常见因素之一。本例P_1-R间期为0.19秒,P_2-R间期为0.48秒,传导时间明显延长,
Male patient, 65 years old. In 4 days, she was admitted to hospital in March 1989. Clinical diagnosis: “Coronary heart disease arrhythmia.” ECG after admission: P wave morphology was normal, PP interval was 0.90 seconds, P_1-R interval was 0.19 seconds, P_2-R interval suddenly doubled to 0.48 seconds, P_3 did not pass, a regular 3: 2 Conduction. (See photo) ECG diagnosis: Ⅱ ° atrioventricular block, atypical Venturi phenomenon. Discussion: Atrioventricular node dual pathway conduction is one of the common causes of atypical Venturi phenomenon. In this case P_1-R interval was 0.19 seconds, P_2-R interval was 0.48 seconds, the conduction time was significantly extended,