A patient with atrial fibrillation receives diltiazem to control the ventricular rate. Which effect explains its therapeutic action?
Correct answer: A. Slows conduction through the atrioventricular node
- A. Slows conduction through the atrioventricular node
- B. Increases conduction through the atrioventricular node
- C. Stimulates the kidneys to excrete uric acid
- D. Increases platelet production in bone marrow
Explanation
Diltiazem is a nondihydropyridine calcium channel blocker that slows atrioventricular nodal conduction and can reduce the ventricular response. It does not increase cardiac conduction or act as a diuretic.
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About Cardiovascular and Respiratory Drugs
Cardiovascular and respiratory drugs include antihypertensives, diuretics, antianginal agents, antiarrhythmics, cardiac glycosides, anticoagulants, bronchodilators, corticosteroids and cough medicines. Questions focus on mechanisms, indications, contraindications, toxicity and monitoring, especially the difference between drugs that reduce blood pressure, improve cardiac output or open narrowed airways.
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