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Antidysrhythmic

Cardio

QuestionAnswer
class 1a disopyramide; procainamide; quinidine
class 1b lidocaine; tocainide
class 1c tambocor
class II atenolol; metoprolol; propranolol
class III bretylium; ibutulide
class IV diltiazem; verapamil
unclassified adenosine
class 1a exert action on sodium channels by blocking them; slow repolarization and increase APD
class 1b exert action on sodium channels by blocking them; accelerate repolarization and decrease APD
class 1c exert action on sodium channels by blocking them; little effect on APD
class II beta-blockers. reduce sympathetic nervous system stimulation to heart and thus slow transmission through conduction system; decrease oxygen needed by heart
class III increase APD prolonging repolarization in phase 3; block potassium channels
class IV CCBs. inhibit slow-channel pathways that are calcium dependent
unclassified slows conduction time through AV node; stops the heart
Created by: 2a2j
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