<prompt> Class I anti arrhythmic drugs belongs to all EXCEPT:QuinidineProcainamideFlecainidePropranolol  <response>: Propranolol: Ref: ANTIARRHYTHMIC DRUGS Class I. Membrane stabilizing agents Na channel blockers A Moderately decreases dvdt of o-phase B Little decrease in dvdt of o-phase C Marked decrease in dudt of o-phase Quinidine, Procainamide Disopyramide, Mircizine Lignocaine, Mexiletine phenytoin Propafenone, Flecanide II. Antiadrenergic agents pblockers Propranolol, esmolol, Sotalol also class III III. Agents widening AD Prolong repolarizing and ERP Amiodarone, Bretylium also class II Dofetide IV Calcium channel blockers Verapamil, Diltiazem 