Used primarily in the treatment of cardiac arrhythmias, this compound functions as a class III antiarrhythmic agent by prolonging the action potential duration and refractory period in cardiac tissue. It is effective in maintaining normal sinus rhythm in patients with atrial fibrillation or flutter. Due to its potassium channel blocking properties, it helps prevent re-entrant arrhythmias and stabilizes heart rhythm without significant beta-blocking activity. It is often considered in patients who do not respond to or cannot tolerate beta-blockers. Careful monitoring is required due to the risk of QT interval prolongation and potential for proarrhythmic effects, especially at higher doses or in those with impaired renal function.