Circ:Cardiovasc Inte:基于CT的指数主动脉瓣环尺寸预测假体-患者不匹配

2019-04-08 xiangting MedSci原创

在所有的指数瓣环尺寸组中,TAVR后PPM的发生率均明显低于SAVR,这反映了经导管的血流动力学性能优于外科瓣膜,无论出现PPM的倾向性如何。

经导管主动脉瓣置换术(TAVR)后瓣膜的血流动力学表现通常优于外科主动脉瓣置换术(SAVR),尤其是本身瓣环尺寸较小的患者。然而,考虑到瓣环尺寸和患者体型,对于瓣膜-患者不匹配(PPM)倾向性不同的患者是否也存在这种差异尚不清楚。

SURTAVI试验(外科置换和经导管主动脉瓣植入)在中危患者中比较了使用自扩张瓣膜的TAVR与SAVR。基于多检测器计算机断层扫描的主动脉瓣环尺寸由周长导出的直径组成,其除以体表面积生成指数瓣环尺寸。根据指数瓣环尺寸,将患者分为小(9-12mm/m2)、中(>12-14mm/m2)和大组(>14-18mm/m2)。通过1年随访,比较组内TAVR与SAVR的PPM、血流动力学、临床和功能结局。瓣膜较大的TAVR患者,指数瓣环尺寸增大(P<0.001),而接受SAVR的患者瓣膜大小没有差异(P=0.74)。TAVR vs. SAVR后所有尺寸组患者出院时的指数有效瓣口面积更大和平均梯度更低。TAVR vs. SAVR所有组的PPM发生率更低(P<0.001),TAVR(P=0.04)和SAVR(P=0.03)的PPM发生率均随着指数瓣环尺寸增大而下降。指数瓣环尺寸是TAVR和SAVR后PPM的独立预测因子。TAVR和SAVR的所有组间临床结局相似,除了TAVR后大指数瓣环组的再介入治疗率显著高于SAVR(2.5%vs.0%; P=0.01)但没有显著的相互作用(Pint=0.81)。

在所有的指数瓣环尺寸组中,TAVR后PPM的发生率均明显低于SAVR,这反映了经导管的血流动力学性能优于外科瓣膜,无论出现PPM的倾向性如何。应更多关注SAVR后PPM的预防。心脏团队应考虑此信息以推荐特定的手术或瓣膜。

原始出处:

Stuart J. Head. Computed Tomography-Based Indexed Aortic Annulus Size to Predict Prosthesis-Patient Mismatch. Circ: Cardiovascular Interventions. 01 April 2019.

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