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1·Most studies have shown that paradoxical embolism is the principal mechanism for stroke in patients with ASA.

大量的研究结果表明，反常性栓塞是房间隔瘤病人发生脑卒中的主要机制。

2·Objective:To evaluate the feasibility of transcatheter closure of patent foramen ovale(PFO)to prevent paradoxical embolism with Amplatzer occluder device.

目的：经导管封堵卵圆孔未闭（PFO）预防脑的矛盾栓塞并评价其疗效。