There were 248 attach in the 45 cases. The factors that trigger PAf include APB 84.97%,sinus brabycardia 7.73%,atrial flutter 2.14%,tachycardia 2.57%.

• 45例PAf患者共248次Af发作；心电触发因素中房性期前收缩占84.；97%25；窦性心动过缓占7