In the treatment of angina, the mechanism of action of a beta-adrenergic blocker is:
Decreased peripheral resistance.
Increased contractility and heart rate.
Relaxation of arterial and venous smooth muscle.
Slowed heart rate and decreased contractility of the heart.
The Correct Answer is D
A. Beta-adrenergic blockers primarily work by decreasing heart rate and contractility rather than directly affecting peripheral resistance.
B. Beta-adrenergic blockers decrease contractility and heart rate, rather than increasing them.
C. Relaxation of arterial and venous smooth muscle is typically associated with calcium channel blockers, not beta-adrenergic blockers.
D. Beta-adrenergic blockers slow the heart rate and reduce the force of contraction of the heart muscle, reducing myocardial oxygen demand and helping to relieve angina symptoms.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Sexual side effects, including decreased libido and difficulty achieving orgasm, are common with sertraline and should be included in discharge teaching.
B. Sertraline can be taken at any time of day and does not necessarily need to be taken at bedtime.
C. Urinary adverse effects are not typically associated with sertraline use.
D. Light sensitivity is not a common side effect of sertraline.
Correct Answer is A
Explanation
Explanation:
A. This statement accurately reflects the relationship between high cholesterol levels and cardiovascular disease risk.
B. This statement is incorrect; dietary modifications are often recommended to help control cardiovascular risk, including reducing cholesterol intake.
C. This statement is incorrect; high cholesterol levels are a well-established risk factor for cardiovascular disease.
D. This statement is incorrect; while family history can predispose individuals to high cholesterol, anyone can develop high cholesterol and be at risk for cardiovascular disease.
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