Which of the following classes of medication decreases heart rate, contractility, and blood pressure, and is used to increase survival rates in post-myocardial infarction patients?
ACE inhibitors
Vasodilators
Beta blockers
Diuretics
The Correct Answer is C
A. ACE inhibitors primarily affect blood pressure and heart remodeling but do not directly decrease heart rate or contractility.
B. Vasodilators mainly lower blood pressure by expanding blood vessels and do not primarily affect heart rate or contractility.
C. Beta blockers decrease heart rate, contractility, and blood pressure, and are specifically used to improve survival after a heart attack by reducing the heart's workload and oxygen demand.
D. Diuretics primarily reduce blood pressure by decreasing blood volume but do not directly decrease heart rate or contractility.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Explanation:
A. Beta blockers are used to manage blood pressure and heart rate but are a different class.
B. Isosorbide is a nitrate, which is used primarily to treat and prevent episodes of angina by relaxing and widening blood vessels.
C. Calcium channel blockers also manage blood pressure and chest pain but act through a different mechanism.
D. Glycoprotein IIb/IIIa receptor antagonists are used to prevent platelet aggregation and are typically used in acute coronary syndrome, not as a long-term treatment for angina.
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.
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