Method: Have Atropine tests on 76 suspected SSS sufferers who have Sinus bradycardia. And then have transesophageal atrial pacing(TAP) on the positive ones.
方法：对76例疑有SSS的窦性心动过缓者作阿托品试验，阳性者作食管心房调搏。
Objective:To use transesophageal atrial pacing(TAP) to duplicate superventricular tachycardia(SVT) in 70 cases with suspected paroxysmal superventricular tachycardia(PSVT).
目的：通过运用食道心房调搏检查，对疑有阵发性室上性心动过速发作的70例患者进行复制。
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