(来学网)主动脉瓣狭窄时,于胸骨旁左心室长轴M型可见收缩期主动脉右冠瓣和无冠瓣二个瓣叶开放间距应小于
  • A.
    (来学网)15MM
  • B.
    (来学网)16MM
  • C.
    (来学网)18MM
  • D.
    (来学网)20MM
  • E.
    (来学网)26MM