adj. Used to treat or prevent (heart) arrhythmia (irregular beat).
n. A drug that treats or prevents (heart) arrhythmia (irregular beat).
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a drug used to treat an abnormal heart rhythm
Word Usage
"Sanofi developed Multaq as a so-called antiarrhythmic drug to treat atrial fibrillation, which affects about 2.2 million Americans and 4.5 million people in the European Union, according to figures from the American Heart Association and Sanofi."