Abstract：Objective To investigate the factors of inducing atrioventricular nodal reentrant tachycardia (AVNRT) during transesophageal atrial pacing (TEAP) examination. Methods A total of 163 patients undergoing TEAP examination were randomly selected for retrospective study; AVNRT was induced by cardiac electrophysiological examination. However, AVNRT was induced by TEAP in 92 patients (observation group) while AVNRT or other arrhythmias failed to be induced in 71 patients (control group). Setting the basic pacing interval (S1S1 interval) as 600 ms, we measured PR interval and effective refractory period of atrioventricular node; given programmed atrial S1S2 stimulation or frequencyincreasing S1S1 stimulation, we also measured the longest SR interval (SR prolonged interval) and the longest S1S1 interval in atrioventricular Wenckebach conduction (Wenckebach cycle). Data of gender and age were recorded. The inducing factors of AVNRT were explored by univariate and multivariate analysis. Results Bivariate Logistic regression analysis verifies that gender (OR=0.252, P=0.030), SR prolonged interval (OR=1.052, P＜0.01) and Wenckebach cycle (OR=0.938, P＜0.01) are independent risk factors for AVNRT inducement with a prediction accuracy rate of 92.6%. Conclusion Gender, SR prolonged interval and Wenckebach cycle can be considered as predictive factors for inducing AVNRT during TEAP examination with high value in clinical practice.
