ANTIARRHYTHMIC DRUGS

1. CLASS I: Membrane stabilizing agents (Na+ channel blockers)
    A. Moderately decrease dv/dt of 0 phase
                Quinidine
                Procainamide
                Disopyramide
                Moricizine

    B. Little decrease in dv/dt of 0 phase
                Lidocaine
                Mexiletine
    C. Marked decrease in dv/dt of 0 phase
                Propafenone
                Flecainide

2. CLASS II: Antiadrenergic agents (β  blockers)
                Propranolol
                Esmolol
                Sotalol (also class III)

3. CLASS III: Agents widening AP(prolong repolarization and ERP)
                Amiodarone
                Bretylium (also class II)
                Dofetilide
                Ibutilide

4. CLASS IV: Calcium channel blockers
                Verapamil
                Diltiazem

Additional antiarrhythmic drugs
    a. For paroxysmal supraventricular tachycardia (PSVT):
                Adenosine
                Digitalis

    b. For atrio-ventricular (A-V) block:
        Sympathomimetics:
                Isoprenaline, etc.

        Anticholinergics:
                Atropine