| 摘要 |
<p>A prosthetic heart valve (1300) for replacing a native valve includes a collapsible and expandable stent (1306) having a proximal end (1302) and a distal end (1304), and a valve assembly (1308) disposed within the stent, the valve assembly including a plurality of leaflets (1310) and a cuff (1312) annularly disposed about the stent. The cuff includes a surplus portion (1322) capable of forming a sealing structure having a diameter greater than a diameter of the proximal end of the stent when deployed.</p> |
