preexcitation

preexcitation /pre·ex·ci·ta·tion/ (pre-ek?si-ta´shun) premature activation of a portion of the ventricles due to transmission of cardiac impulses along an accessory pathway not subject to the physiologic delay of the atrioventricular node; sometimes used as a synonym of Wolff-Parkinson-White syndrome.

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pre·ex·ci·ta·tion (prk-s-tshn)

n.

Premature activation of part of the ventricular myocardium by an impulse that travels by an anomalous path and so avoids physiological delay in the atrioventricular junction.