Antiarrhythmic agents

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IA Quinidine
Procainamide
Disopyramide
Na channel blockers ↑ QT Procainamide: WPW, VT (3rd line) Quinidine: cinchonism
Procainamide (SLE)
Torsades
IB Lidocaine
Mexiletine
IC Flecainide
Propafenone
Use-dependence (↑QRS with ↑HR)
II Beta-blockers
III Amiodarone
Ibutilide
Dofetilide
Sotalol
K channel blockers
Reverse use-dependence
Torsades
Amiodarone: Pulmonary fibrosis, hepatoxicity, thyroid disease, cornal/skin deposits
IV CCBs PR
Use-dependence