资料来源 : pyDict

心收缩前期

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Perisystole \Per`i*sys"to*le\, n. [Pref. peri- + systole: cf. F.
   p['e]risystole.] (Physiol.)
   The interval between the diastole and systole of the heart.
   It is perceptible only in the dying.