The nurse understands that which of the following agents works by blocking the passage of calcium in the heart resulting in vascular smooth muscle relaxation?
a. atenolol c. lidocaine
b. amiodarone d. verapamil
ANS: D
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A Incorrect: Atenolol is a beta-adrenergic blocking agent.
B Incorrect: Amiodarone is a class III antidysrhythmic agent.
C Incorrect: Lidocaine is a class III antidysrhythmic agent.
D Correct: Verapamil is a calcium channel blocking agent or antagonist.
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