Perisystole

• (n.) The interval between the diastole and systole of the heart. It is perceptible only in the dying.
Found on http://thinkexist.com/dictionary/meaning/perisystole/

Perisystole

Per`i·sys'to·le noun [ Prefix peri- + systole : confer French périsystole .] (Physiol.) The interval between the diastole and systole of the heart. It is perceptible only in the dying.
Found on http://www.encyclo.co.uk/webster/P/58
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