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患者,男,56岁。因“高血压病Ⅲ期,脑血栓形成,冠心病”住院。住院期间心率50次/mim左右,心电图示窦性心动过缓。为了解窦房结功能,作食管心房调搏检查,S_1S_1法:当刺激频率达160次/min(375ms)时,刺激波发生扭转,由向上转为双向,然后转为向下,每4～20个刺激波扭转1次,刺激波的幅度亦发生改变,随着刺激频率增快,扭转次数增多,调搏至220次/mim时仍为扭转(附图)。
Patient, male, 56 years old. Due to “hypertension stage Ⅲ, cerebral thrombosis, coronary heart disease” hospitalized. Heart rate during hospitalization 50 / mim or so, ECG shows sinus bradycardia. To understand the function of the sinoatrial node for esophageal atrial pacing check, S_1S_1 method: when the stimulation frequency of 160 times / min (375ms), the stimulus wave is reversed, from up to bi-directional, and then turned down, every 4 ~ Twenty stimulation waves were reversed one time, and the amplitude of the stimulation wave also changed. As the stimulation frequency increased, the number of torsion increased and the twitch was reversed at 220 times / mim (with photos).