In patients with symptomatic aortic stenosis and a small aortic annulus, a self-expanding valve has similar rates of clinical outcomes at 1 year and lower rates of bioprosthetic dysfunction compared with a balloon-expandable valve.

中文翻译：

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对于主动脉环较小的患者，自扩张瓣膜比球囊扩张瓣膜更有益

在有症状的主动脉瓣狭窄和主动脉环较小的患者中，与球囊扩张瓣膜相比，自扩张瓣膜的 1 年临床结果相似，并且生物假体功能障碍的发生率较低。