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CCT Exam - Cardiac Medications Questions and Answers
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CCT Exam - Cardiac Medications Questions and Answers
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CCT Exam - Cardiac Medications Questions and AnswersType I Antiarrhythmics Correct Ans-sodium channel blockers: inhibit the movement of
sodium across cellular membranes (slows conduction velocity and prolongs the refractory
period)
Type Ia antiarrythmics Correct Ans--Moderate sodium channel blockade, increased
refractory period
-commonly used to treat supraventricular and ventricular tachyarrhythmias
i.e. quinidine, procainamide, disopyramide
Type Ib antiarrythmics Correct Ans--weak sodium channel blockade, decreased refractory
period
-commonly used to treat ventricular arrhythmias
i.e. lidocaine, tocainide, mexiletine
Type Ic antiarrhythmics Correct Ans--strong sodium channel blockade, no effect on
refractory period
-slow conduction velocity
-used to treat life threatening SVT and VT
i.e. flecainide, propafenone, moricizine
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