经食道心房调搏诱发房颤21例的心房生理学分析

目的：探讨食道心房调搏对阵发性房颤检查的临床价值。方法：回顾性分析21例食道心房调搏诱发的阵发性房颤的心房电生理特性。结果：程序刺激、分级起搏诱发10例房颤，均有明确房颤史，猝发电脉冲诱发的11例中5例有明确的房颤史。房颤组21例与正常对照组19例相比，心房有效不应期偏短，相对不应期区域扩大。最大房间传导时间延长。结论：食道心房调搏确定临床症状与房颤关系以及房颤的预测具有一定价值。

Atrial Electrophysiologic Properties of Atrial Fibrillation Induced by Transesophageal Atrial Pacing

Objective:Investigate clinical value of transesophageal atrial pacing studying paroxysmal atrial fibrillation.Methods:We retrospected the atrial electrophysiologic properties of 21 patients with paroxysmal atrial fibrillation induced by transesophageal atrial pacing.Results:That 10 patients with atrial fibrillation induced by programmed stimulation and incremental pacing had a documented history of atrial fibrillation and five of 11 patients with atrial fibrillation induced by rapid atrial pacing had a documented history of atrial fibrillation.The group of 21 patients with atrial fibrillation by transesophageal atrial pacing compared with the contral one of 18 normal subjects revealed that atrial effective refractory period shortened,the zone of atrial relative refactory period increased,maxinum duration of interatrial conduction lenghtend.Conclusions:We think transesophageal atrial pacing has centain value for defining clinical symptoms compatible with atrial fibrillation and atrial fibrillation forecast.