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1·The ablation target site was the isthmus between tricuspid valve annulus and inferior vana cava.

位于三尖瓣环和下腔静脉口间的峡部为消融部位。

2·Objective:To evaluate the effectiveness and safety of inserting an inferior vana cava filter(IVCF) to prevent the pulmonary embolism due to detachment of the thrombus caused by varieties of factors.

目的：评价置入下腔静脉滤过器预防各种因素所致静脉血栓脱落引起肺动脉栓塞的效果和安全性。