JACC:关于经导管主动脉瓣血栓形成,你了解多少?

2016-11-12 MedSci MedSci原创

目前,关于经导管主动脉瓣置换术(TAVR)后的经导管心脏瓣膜(THV)血栓形成的发生率,临床意义以及易感因素的数据都是有限的。来自丹麦的研究人员通过对比度增强的多层CT(MDCT)评估了TAVR后THV血栓形成的发生率,潜在预测因子和临床意义。在460例连续接受Edwards Sapien XT或Sapien 3 (Edwards Lifesciences, Irvine,  Calif

目前,关于经导管主动脉瓣置换术(TAVR)后心脏瓣膜(THV)血栓形成的发生率,临床意义以及易感因素的数据都是有限的。

来自丹麦的研究人员通过对比增强多排螺旋CT(MDCT)评估了TAVR后THV血栓形成的发生率,潜在预测因子和临床意义。

在460例连续使用Edwards Sapien XT或Sapien 3 (Edwards Lifesciences, Irvine,  California)THV 进行TAVR的患者中,405例患者(88%)在TAVR术后1〜3个月时接受MDCT和经胸和经食管超声心动图评估。MDCT扫描用于评估指示THV血栓形成的低密度瓣叶增厚情况。

在405例患者中,28例(7%)患者通过MDCT验证了THV血栓形成。共有23例患者有亚临床THV血栓形成,5例(18%)患者则出现临床显性阻塞性THV血栓形成。Edwards Sapien XT和Sapien 3 THV在血栓形成风险方面无差异(8% vs 6%;p=0.42)。未接受华法林治疗患者的THV血栓风险高于接受华法林的患者(10.7% vs 1.8%;风险比[RR]:6.09;95%置信区间[CI]:1.86至19.84)。较大的THV与THV血栓形成的风险增加相关(p=0.03)。在多变量分析中,29-mm THV(RR:2.89;95%CI:1.44至5.80)和TAVR后未进行华法林治疗(RR:5.46;95%CI:1.68至17.7)可独立预测THV血栓形成。通过随访经食管超声心动图和MDCT记录数据表明,85%的患者通过华法林治疗有效地逆转了THV血栓形成,并将THV功能正常化。

这项大型研究中THV血栓形成的发生率为7%。较大的THV可能诱发THV血栓形成,而用华法林治疗似乎具有保护作用。

原始出处:

Nicolaj C. Hansson,Erik L. Grove,Henning R. Andersen,et al. Transcatheter Aortic Valve Thrombosis: Incidence, Predisposing Factors, and Clinical Implications. J Am Coll Cardiol. 2016;68:2059-2069.

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    2016-11-16 hbwxf
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    2016-11-14 lsj631