of or relating to any substance that prevents, inhibits, or alleviates heartbeat irregularities.

What is meant by antiarrhythmic drug?

Antiarrhythmics are drugs that are used to treat abnormal heart rhythms resulting from irregular electrical activity of the heart.

Why are antiarrhythmics used?

Antiarrhythmic medications prevent and treat abnormal heartbeats (arrhythmias). Problems with your heart's rhythm are caused by a disruption in the heart's electrical system. A drug called atropine may be prescribed if your heart beats too slowly (bradycardia).