| 摘要 |
<p>A prosthetic heart valve consists of a tubular membrane having a flexible generally circular inlet end adapted to be attached to the annulus of a heart with one side of the tube held to the heart cavity as by attachment to the papillary muscle while the other side of the tube is formed as an extended single flap adapted to move toward and away from the membrane on the attached side to provide a closed or open valve at the outlet end.</p> |
