This quiz discusses the drugs used in the treatment of dysrhythmias.
It possesses qualities of all classes of antiarrythmics
Drug interactions are a major concern
Adverse effects are a major concern
It has a relatively short half-life
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They are used in slowing the ventricular rate
They are effective in reducing "sudden death" after a myocardial infarction
They are effective in the therapy of atrial arrhythmias
They are known to cause tachycardia in high doses
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1 mg
2 mg
4 mg
8 mg
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True
False
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They generally shorten the QT interval
Procainamide has a unique toxic effect called lupus erythematosis
Disopyramide has strong anticholingeric effects
They have significant interactions with potassium-channel blockers
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It is a class 1B sodium channel blocker
It is mainly metabolized by the kidney
It is indicated for ventricular arrhythmias
It is notable for CNS reactions
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It has a half-life of over one month
It is indicated for the acute termination of supraventricular tachycardia (SVT)
Its effects can be reversed using theophyline as the antidote
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It has a shorter half-life than amiodarone
It has no clinically relevant drug interactions
It is generally safer than amiodarone
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Diltiazem
Disopyramide
Flecainide
Lidocaine
Mexiletine
Phenytoin
Procainamide
Propafenone
Quinidine
Sotalol
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Fast fibers affected by ischemia tend to have a more negative membrane potential
They block the channels in the active and inactive states
They increase the effective refractory period of the cardiac cell
Qunidine and flecainide are examples
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Diltiazem
Disopyramide
Flecainide
Lidocaine
Mexiletine
Phenytoin
Procainamide
Propafenone
Quinidine
Sotalol
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True
False
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They cannot slow conduction through the AV node
They decrease the AV node refractory period and prolong the PR interval
They may be combined with beta-blockers for a synergistic effect
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Dofetilide is contraindicated in this patient
125 mcg PO BID
250 mcg PO BID
500 mcg PO BID
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Blood pressure
Serum creatinine
Liver function tests
Heart rate
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Diltiazem
Disopyramide
Flecainide
Lidocaine
Mexiletine
Phenytoin
Procainamide
Propafenone
Quinidine
Sotalol
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