The size of the vulnerable window was largest for pulmonary vein foci, becoming markedly smaller for right atrial foci, especially those near the sinoatrial node.

• 肺静脉异位灶的易损窗口最宽，右房异位灶的易损窗口明显变窄，在窦房结附近的异位灶，易损窗口尤其窄。