(来学网)窦性P波振幅的正常值为
  • A.
    (来学网)肢体导联<0.25MV,胸前导联<0.15MV
  • B.
    (来学网)肢体导联<0.20MV,胸前导联<0.25MV
  • C.
    (来学网)肢体导联<0.25MV,胸前导联<0.25MV
  • D.
    (来学网)肢体导联<0.25MV,胸前导联<0.20MV
  • E.
    (来学网)肢体导联>0.25MV,胸前导联<0.20MV
正确答案:
D
答案解析:
正常成人P波时限为0.08~0.11s,平均为(0.085±0.015)s。以超过0.11s为异常。肢体导联上静息时P波振幅正常上限小于0.25mV;在胸导联,P波振幅小于0.20mV。