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Which drug slows atrioventricular conduction and increases atrioventricular refractory period and is used to control ventricular rate in persons with atrial fibrillation?


A) sotalol
B) ibutilide
C) diltiazem
D) disopyramide
E) adenosine

F) A) and B)
G) C) and D)

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C

Esmolol can be rapidly titrated to obtain the desired effect in persons with atrial tachycardia because of which drug property?


A) spontaneous decomposition
B) eliminated by the lungs
C) rapid renal excretion
D) inactivated by plasma esterase
E) sequestered by reticuloendothelial cells

F) All of the above
G) B) and C)

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D

Because of the risk of serious toxicity, a yearly chest radiogram is required in persons taking which drug?


A) ibutilide
B) sotalol
C) quinidine
D) procainamide
E) amiodarone

F) B) and C)
G) A) and E)

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The electrocardiogram must be closely monitored during dosage titration with dofetilide because of its ability to produce which abnormality?


A) QRS widening
B) QT prolongation
C) asystole
D) PR shortening
E) afterdepolarizations

F) B) and D)
G) A) and B)

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B

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