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A patient with bilateral renal artery stenosis has hypertension. Which of the following medications may precipitate acute renal failure?

a. Thiazide diuretic
b. Beta blocker
c. Calcium channel blocker
d. Angiotensin II receptor blockers

User Fguillen
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1 Answer

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Final answer:

Angiotensin II receptor blockers can precipitate acute renal failure in patients with bilateral renal artery stenosis because they reduce the glomerular filtration rate necessary for kidney function.

Step-by-step explanation:

The patient with bilateral renal artery stenosis has a condition where the blood vessels leading to both kidneys are narrowed, which compromises kidney function. Among the listed medications, angiotensin II receptor blockers (d. Angiotensin II receptor blockers) can precipitate acute renal failure in these patients. The reason is that these medications can further decrease glomerular filtration by blocking the effects of angiotensin II, which is needed to maintain sufficient pressure to filter blood through the kidneys when the renal arteries are narrowed. Additionally, angiotensin II facilitates the reabsorption of sodium and release of aldosterone, which is significant in maintaining blood pressure and kidney function.

User Janeshs
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