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经食管心房刺激在诱发及终止室上性心动过速、观察抗心律失常药物疗效等方面的应用近年来受到了很大的重视。为了减少患者的不适感觉,应尽量降低经食管心房起搏的阈值。有报告指出,用7～12毫秒的宽刺激脉冲或3厘米的电极间距可能使起搏阈值降至最低。本文研究不同电极间距、脉冲宽度及导管插入深度对最大限度地降低起搏阈值所起的作用。方法:本组共30例,包括有阵发性室上性心动过速、心房扑动,室性心动过速者共27例;窦性心动过缓者3例。其中大多数患者,为了心动过速转复治疗而进行食管心脏电刺激。先从口腔或鼻至胸骨
Esophageal atrial stimulation in the induction and termination of supraventricular tachycardia, antiarrhythmic drugs observed efficacy and other aspects of the application in recent years has received great attention. In order to reduce the patient’s discomfort, the threshold of transesophageal atrial pacing should be minimized. It has been reported that a wide stimulation pulse of 7 to 12 milliseconds or an electrode separation of 3 cm may minimize the pacing threshold. This article studies the effect of different electrode spacings, pulse widths, and catheterization depths on minimizing pacing thresholds. Methods: The group of 30 cases, including paroxysmal supraventricular tachycardia, atrial flutter, ventricular tachycardia in a total of 27 cases; sinus bradycardia in 3 cases. Most of these patients underwent esophageal cardiac electrical stimulation for tachycardia rehabilitation. First from the mouth or nose to the sternum