Abstract：ObjectiveT o investigate the factors influencing the termination of supraventricular tachycardia(SVT) by transesophageal atrial pacing(TEAP). Methods We selected 78 patients in whom SVT occurring during TEAP had been terminated by overspeed suppression. They were divided into pulse number≤5 group (41 cases) and pulse number＞5 group (37 cases) according to the number of termination pulses. We compared potential factors’ influence on the termination of SVT between the two groups, and these factors included age, sex, output voltage, depth of intubation, type and frequency of tachycardia, termination frequency, frequency difference, SR prolonged interval, Wenckebach block point and 2 ∶1 block point. Results The tachycardia and termination frequency in the pulse number>5 group are significantly higher than those in the pulse number≤5 group (P＜0.05). Bivariate Logistic regression analysis confirms that tachycardia frequency is the influencing factor for the termination of SVT by TEAP (OR=1.03, P=0.02). The faster the tachycardia frequency is, the more pulses are needed for overspeed stimulation. Conclusion The frequency of tachycardia has an important influence on the number of released pulses for terminating SVT by TEAP, which should be paid close attention to in clinical operation.
