fibrillation

(fib-ril-a’shun). 1. The quality of being fibrillar. 2. Muscular tremor. 3. A condition of muscular action, especially of the heart muscle, in which the individual fibers take up their own independent action, producing an incoérdinate or vermicular contraction. This fibrillation is distinguished as auricular or ventricular, according as the muscle of the auricle or of the ventricle is ect