心房颤动(房颤)常用直流电或药物成功地复律,但长期维持窦性心律(窦律)较困难。虽用ⅠA类药物可防止房颤复发,但复律后一年之内的复发率仍较高、曾有报导提示房颤病人之左房内径在超声心动图测量>45mm时则窦律难以维持。该文对 Atrial fibrillation (atrial fibrillation) commonly used DC or drug successfully cardioversion, but long-term maintenance of sinus rhythm (sinus rhythm) more difficult. Although class Ⅰ A drugs can prevent the recurrence of atrial fibrillation, but the recurrence rate within a year after cardioversion is still high. There have been reports that atrial fibrillation patients with left atrial diameter echocardiography in the measurement of> 45mm sinus law is difficult to maintain . The text right