cardiac arrhythmia car·dia·carr·hythmia uncommon noun 1. an abnormal rate of muscle contractions in the heart Synonymscardiac arrhythmiaarrhythmia Related words Broader terms heart disease Narrower terms fluttergallop rhythmatrial fibrillationbradycardiaheart blockpremature ventricular contractiontachycardiaventricular fibrillation WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
