Abstract
In two cases of palmar hyperhidrosis, one had transient Mobitz type II atrioventricular block and the other had transient prolongation of PQ intervals after endoscopic thoracic sympathectomy. Both cases had first degree atrioventricular block preoperatively. In the first case, an 18-year-old female, Mobitz type II atrioventricular block occurred transiently ten hours after the T2, 3, 4 thoracic sympathectomy. However, no arrhythmia was observed on Holter electrocardiogram recorded throughout the first postoperative day. In the second case, a 25-year-old female, prolongation of PQ intervals was observed immediately after the T2, 3 thoracic sympathectomy and during the first postoperative day within one month, the PQ interval returned to preoperative state.
