Definify.com

Webster 1913 Edition

Noun.

[Pref.

peri-

systole

: cf. F.

périsystole

(Physiol.)

The interval between the diastole and systole of the heart. It is perceptible only in the dying.

Noun.

perisys'toly. [Gr. about, and contraction.] The pause or interval between the systole or contraction, and the diastole or dilatation of the heart.

perisystole ‎(uncountable)