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CSC Cardiac Nursing Subspecialty

Category - Problems

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Which of the following class of anti-dysrhythmic drugs is correctly matched with its mechanism of action?

Class II - Inhibition of sodium channels
Class I - Inhibition of sodium channels
Class III - Calcium channel blockers
Class IV - Inhibition of potassium efflux

Explanation

Answer: B - Class I anti-dysrhythmic agents inhibit sodium channels. Class II drugs include beta-adrenergic receptor antagonists, which slow heart rate and increase cardiac muscle contraction. Class III drugs inhibit potassium efflux during repolarization. Class IV agents include calcium channel blockers.

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CSC Cardiac Nursing Subspecialty

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CSC Cardiac Nursing Subspecialty

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