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parasystole

parasystole (par-a-sis´to-le)

A second automatic rhythm existing simultaneously with normal sinus or other dominant rhythm, the parasystolic center being protected from the dominant rhythm's impulses so that its basic rhythm is undisturbed, although it may be manifest in the ECG only at various multiples of its basic periodicity.parasystolic beat; [para- + G. systole, a contracting]

 

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