What do antiarrhythmic medications do? Antiarrhythmic drugs work against arrhythmias, which are abnormal heart rhythms. These medications are effective in treating fast arrhythmias, such as atrial fibrillation, atrial flutter, ventricular tachycardia (VT), and supraventricular tachycardia (SVT). Some of the medications in this class include the following: These drugs are designed to slow down the electrical […]