| 单词 |
prosthetic heart valve |
| 释义 |
DictionarySeevalveprosthetic heart valve
 TYPES OF MECHANICAL HEART VALVES: A. caged ball valve; B. monoleaflet. C. bileafletprosthetic heart valveA substitute valve used to replace a diseased valve. There are two main types of prostheses: those made from biological tissues, e.g., the heart valves of animals, esp. pigs, and those made from biocompatible materials, e.g., metals or polymers. Biocompatible mechanical valves may be constructed in a variety of ways, e.g., from a ball that moves up and down in a cage; with bileaflet valves that close in the midline; or with a single leaflet (which tilts to open and close). See: illustrationSee also: valveAcronymsSeePHV |
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