经食管调搏诱发左侧旁道并房室结加速传导心动过速

探讨左侧旁道 (LAP)并房室结加速传导 (EAVNC)心动过速 (TA)经食管诱发方式的影响 ,对 5 9例突发突止TA患者作食管心房调搏和心内电生理检查。结果有 18例具有房室结加速传导 ,SR间期轻度延长 ,诱发室上性心动过速 (SVT)的方法与无EAVNC患者具有不同的刺激模式。结论 :当心房起搏频率≥ 2 0 0次 /分 ,房室传导是 1∶1,需更强的S1S2 S3 或Burst法才能诱发SVT ,这样可避免遗漏左侧隐匿性旁道的诊断 ,前向 1∶1传导的AH间期是决定LAP并EAVNC顺向型房室折返性心动过速频率的重要因素。

In Tachycardia of Left Accessory Path and Enhanced Atriovenicular Nodal Conduction induced by Transesophageal Pacing

To examinate tachycardia of left accessory path(LAP)and enhanced atroventricular nodal conduction (EAVNC),59 cases of tachycardia were proformed transesophageal atrial pacing(TEAP)and electrophysiological test(EPS). 18 cases with EAVNC and SR interval slight prolongation were found in LAP. The methods of inducing tachycardia were different between 18 case above and 20 cases with no EAVNC . Conclusion:It is suggeted that stimulation of premature beat or Burst can induce tachycardia of LAP and EAVNC, when the frequency of TEAP and EPS more than 200 bpm and AV conduction is 1∶1.This can prevent misdiagnosis of concealed LAP AH intervals of anterob-rode condution 1∶1 is the important factor that decides the heart rate of tachycardia of LAP accompanying EAVNC.