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男,65岁,高血压,冠心病入院。心电图记录V_1、V_5导联,P波消失,代之以形态相同,间隔一致的“F”波,频率250次/min,R—R匀齐,间距1.68sQRS时限正常。诊断:心房扑动伴Ⅲ°A—VB交界性逸搏心律。房扑系房性异位起搏点自律性异常增高,或激动在心房内环形运动产生的一种主动性、快速而规则的心律失常。但房扑合并Ⅲ°A—VB少见。与房颤合并Ⅲ°A—VB的发生机制相同。
Male, 65 years old, high blood pressure, coronary heart disease admitted. ECG V_1, V_5 lead, P wave disappeared, replaced by the same shape, the same interval “F” wave frequency of 250 beats / min, R-R uniform, interval 1.68sQRS normal time limit. Diagnosis: atrial flutter with Ⅲ ° A-VB borderline escape rhythm. Atrial flutter Department of ectopic atrial pacemaker abnormal increase in self-discipline, or excitement in the atrial annular movement of a proactive, rapid and regular arrhythmia. However, atrial flutter combined Ⅲ ° A-VB rare. And atrial fibrillation Ⅲ ° A-VB occurs the same mechanism.