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6 Cards in this Set

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  • Back
Anti--Class IA
-Block fast sodium channels in cardiac muscle, resulting in decreased excitability; prolong repolarization
EG: quinidine, procainamide, disopyramide
Anti--Class IB
-Block fast Na channels in cardiac muscle, resulting in decreased excitability; shorten repolarization or have little effect
EG: lidocaine, tocainide
Anti--Class IC
-profoundly slow conduction in normal tissues
EG: Flecainide, propafenone
Anti--Class II
-Beta Blockers--suppress automaticity and rate of impulse conduction, repolarization time unchanged
EG: Propranolol, atenolol
Anti--Class III
-Markedly prolong repolarization time, usually by interfering with the outlfow of potassium through potassium channels
EG: amiodarone, sotalol
Anti--Class IV
-Calcium Channel blockers; block inward movement of calcium to slow impulse conduction (particularly through the AV node) and vascular smooth muscle contraction