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 A
Explanation
A. Atorvastatin (Lipitor) is a statin medication that works by inhibiting the enzyme HMG-CoA reductase, which plays a key role in cholesterol synthesis in the liver, thereby lowering cholesterol levels.
B. Atorvastatin's mechanism of action is well understood; it is not accurate to say its action is not understood.
C. Atorvastatin does not bind to cholesterol; instead, it inhibits its production in the liver.
D. Atorvastatin does not directly cause the body to excrete cholesterol but rather reduces its production in the liver.
Correct Answer is B
Explanation
A. Avoiding tyramine-containing foods is relevant for patients taking MAOIs, not SSRIs.
B. Sexual dysfunction, including decreased libido and difficulty achieving orgasm, is one of the most common adverse effects of SSRIs and should be discussed during patient education.
C. Signs and symptoms of hypertension are not directly related to SSRIs; they may occur with other medications or conditions.
D. Tremors are not as common with SSRIs compared to other classes of antidepressants such as tricyclic antidepressants.
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