患者男性,55岁。因心悸、胸痛来我院就诊。体检:心率83次/min,心律不齐,可闻频繁早搏。X 线胸片未见异常改变。超声心动图示:主动脉增宽,弹性减退。临床诊断:冠心病、心律失常。心电图(附图)为Ⅱ导联连续记录示窦性心律,可见提早出现的室上性 QRS波群,形态与窦性 QRS 略异、其前 P′波倒置、P′-R 间期0.09s,考虑异位起搏点位于房 Male patient, 55 years old. Due to heart palpitations, chest pain to our hospital. Physical examination: heart rate 83 beats / min, arrhythmia, can be heard frequent premature beats. X-ray showed no abnormal changes. Echocardiography: Aorta broadening, elasticity diminished. Clinical diagnosis: coronary heart disease, arrhythmia. Electrocardiogram (with photos) for the Ⅱ lead continuous recording shows sinus rhythm, showing the early occurrence of supraventricular QRS complex, morphology and sinus QRS slightly different, the former P ’wave inversion, P’-R interval 0.09s , Consider ectopic pacemaker is located in the room