1. The act of increasing the rapidity or intensity of the physical or mental processes. 2. In neurophysiology, the complete all-or-none response of a nerve or muscle to an adequate stimulus, ordinarily including propagation of e. along the membranes of the cell or cells involved. See also stimulation.
anomalous atrioventricular e. ectopic atrial beat conducted to the ventricle.
ventricular pre-e. See Wolff-Parkinson-White syndrome.
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