(来学网)主动脉瓣狭窄时,M型超声右冠瓣与无冠瓣开放间距应小于
  • A.
    (来学网)26mm
  • B.
    (来学网)24mm
  • C.
    (来学网)20mm
  • D.
    (来学网)17mm
  • E.
    (来学网)15mm