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临床和心电图资料患者,女性,31岁。患风湿性二尖瓣狭窄5年,因心悸、胸闷,气喘加重,下肢浮肿,不能平卧5天,收治入院。心电图检查发现,P波规律出现,P波形态一致,P-P间期相等,频率为150次/分。R-R间期相等,频率为75次/分。P-R问期固定为0.14秒,房室传导比例为2:1。诊断为Ⅱ度房室传导阻滞,未做任何处理,在做心电图过程中,患者不自主咳嗽后,房室传导突然得到改善,呈1:1下传,P-R间期固定为0.14秒,频率为167次/分,P与QRS波形态未变,为典型阵发性房性心动过速.持续2秒钟后,突然又转为2:1房室传导。后反复多次咳嗽试验,又复为1:1房室传
Patients with clinical and electrocardiographic data, female, 31 years old. Rheumatic mitral stenosis for 5 years, due to heart palpitations, chest tightness, asthma exacerbation, lower extremity edema, can not lie 5 days, admitted to hospital. ECG examination found that P wave law, P wave morphology consistent, P-P interval is equal to a frequency of 150 beats / min. R-R interval is equal to a frequency of 75 beats / min. P-R ask for a fixed period of 0.14 seconds, atrioventricular conduction ratio of 2: 1. Diagnosis of a degree of atrioventricular block, without any treatment, during the electrocardiogram process, patients with involuntary cough, atrioventricular conduction suddenly improved, was 1: 1 down, PR interval was fixed at 0.14 seconds, the frequency For 167 beats / min, P and QRS wave morphology unchanged for the typical paroxysmal atrial tachycardia lasted 2 seconds, suddenly changed to 2: 1 atrioventricular conduction. After repeated cough test, and again for 1: 1 atrioventricular