palpitation
  悸動,跳動,心跳
  pal·pi·ta·tion /ˌpælpəˈteʃən/ 名詞
  心悸
  Pal·pi·ta·tion n.  A rapid pulsation; a throbbing; esp., an abnormal, rapid beating of the heart as when excited by violent exertion, strong emotion, or by disease.
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  palpitation
       n 1: a rapid and irregular heart beat
       2: a shaky motion; "the shaking of his fingers as he lit his
          pipe" [syn: shaking, shakiness, trembling, quiver,
           quivering, vibration]