"Fibrillation" refers to irregular and rapid contractions or movements of a muscle fiber or organ. In medical terms, it often refers to abnormal and uncontrolled heart contractions. Full definition
These levels will be compared to those in dogs with atrial fibrillation with normal echocardiograms and abnormal echocardiograms. (iwfoundation.org)
• In 1990, the number of new cases of atrial fibrillation in men was estimated at 61 per 100,000 population. (sciencedaily.com)
An average human dose equivalent of 500 mg of tyrosine given intravenously reduces susceptibility to life - threatening ventricular fibrillation in experimental animals. (dcnutrition.com)