Class IA Antiarrhythmic Drugs

Class IA antiarrhythmic drugs are medications that help regulate irregular heartbeats by slowing electrical signals in the heart. They work by blocking specific sodium channels, which decreases the speed of electrical conduction, and also affect potassium channels, prolonging the heart's electrical recovery period. This dual action helps stabilize abnormal rhythms and restore a normal heartbeat. Common drugs in this class include quinidine, procainamide, and disopyramide. They are typically used for treating conditions like atrial fibrillation and ventricular arrhythmias, but require careful monitoring due to potential side effects.