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典型病例:患者男性,66岁。5年前出现胸闷、头晕,作心电图示:Ⅲ°A—VB,室性逸搏心律,频率45—50次/分,临床诊断:冠心病,Ⅲ°A—VB。安装VVI起搏器,上述症状消失。近10日来患者自感胸闷、头晕逐渐发展到黑朦,晕厥,最多1日发作可达10余次。动态心电图示(上下连续记录):①P—P规则,其频率110次/分,未见窦性P波下传心室;②可见规则的起搏信号,其频率为65次分,大部分起搏信号后无QRS波,仅有两个起搏信号后有宽大畸形的QRS波;③在三个连续起搏信号后(无QRS波)有宽大畸形的
Typical Cases: Patient Male, 66 years old. 5 years ago appeared chest tightness, dizziness, ECG: Ⅲ ° A-VB, ventricular esophageal rhythm, frequency 45-50 beats / min, clinical diagnosis: coronary heart disease, Ⅲ ° A-VB. VVI pacemaker installed, the above symptoms disappear. Nearly 10 patients with chest tightness, dizziness gradually developed to black, fainting, up to 1 attack up to more than 10 times. Dynamic electrocardiogram (up and down continuous recording): ① P-P rule, the frequency of 110 beats / min, no sinus P wave downlink ventricular; ② regular pacing signal can be seen, the frequency of 65 times the majority of pacing No QRS wave after the signal, only two pacing signals have a large abnormal QRS wave; ③ after three consecutive pacing signals (no QRS wave) has a large deformity