Clinical pharmacology of antiarrhythmic drugs.

DrugsAntiarrhythmic drugs are a class of medications used to prevent or correct cardiac arrhythmias—abnormal heart rhythms that arise from changes in the electrical activity of the heart. These drugs act mainly by modulating ion channels, receptors, or autonomic influences on the heart's electrical conduction system. Their clinical use is essential in managing both supraventricular and ventricular arrhythmias to restore normal rhythm, prevent complications, and reduce mortality from arrhythmic events