导致这样的结果可能是由于炎症，大面积损伤嵌入到了左心房。
This may be due to significant inflammation due to extensive lesion sets in the left atrium.
我们认为心房纤颤病程长，PBMV后瓣口面积小和左房回缩差是心房纤颤复发的可能原因。
It was considered that longer atrial fibrillation history, small mitral area and higher left atrial pressure after PBMV were the key factors of atrial fibrillation recurrence.
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