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作者尝试经食道心房起搏终止5例持续性室性心动过速(VT)。将一极间距离29mm的双极导管经鼻腔插入置于食道远端,记录最大的心房电图,出现室房分离则支持VT的诊断。然后对4例患者给予普鲁卡因酰胺50mg/min,间歇静脉注射,以减慢心率或企图终止VT。当普鲁卡因酰胺总量用至15mg/kg而不能终止VT,并当VT的周期长度接近400msec时,就进行经食道心房起搏,使用电流15mA,脉宽
The authors attempted to terminate 5 cases of persistent ventricular tachycardia (VT) via transesophageal atrial pacing. A bipolar catheter with a distance of 29 mm was inserted through the nasal cavity to the distal end of the esophagus to record the largest atrial electrogram, and the presence of ventricular septum supports the diagnosis of VT. Four patients were then given procainamide 50 mg / min, intermittent intravenous injection to slow heart rate or attempt to terminate VT. When the total amount of procainamide was used up to 15 mg / kg to stop VT, and when the period length of VT was close to 400 msec, transesophageal atrial pacing was performed using a current of 15 mA, a pulse width