In the treatment of angina, the mechanism of action of an organic nitrate is:
Increased contractility and heart rate.
Slowed heart rate and decreased contractility of the heart.
Relaxation of arterial and venous smooth muscle.
Increased peripheral resistance.
The Correct Answer is C
A. Organic nitrates do not increase contractility and heart rate; they typically decrease myocardial oxygen demand.
B. Organic nitrates do not slow heart rate or decrease contractility of the heart.
C. The mechanism of action of organic nitrates in the treatment of angina is the relaxation of arterial and venous smooth muscle, leading to vasodilation and decreased myocardial oxygen demand.
D. Organic nitrates do not increase peripheral resistance; they typically cause vasodilation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Naproxen does not typically interact with sildenafil.
B. Sildenafil interacts with nitrates such as isosorbide, leading to severe hypotension, making it contraindicated in patients taking nitrates.
C. Metformin does not typically interact with sildenafil.
D. Cefuroxime does not typically interact with sildenafil.
Correct Answer is B
Explanation
A. The symptoms described are characteristic of mania, not indicative of an overdose of barbiturates.
B. The symptoms described align with a manic episode, which is a hallmark feature of bipolar disorder.
C. These symptoms are not typically associated with lithium side effects.
D. The symptoms described are not consistent with depression but rather with mania.
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