A patient with acute renal failure is being assessed to determine whether the cause is prerenal, renal, or postrenal. If the cause is prerenal, which condition most likely caused it?
A) Heart failure
B) Glomerulonephritis
C) Ureterolithiasis
D) Aminoglycoside toxicity
Ans: A
Feedback: By causing inadequate renal perfusion, heart failure can lead to prerenal failure. Glomerulonephritis (option B) and aminoglycoside toxicity (option D) are renal causes, and ureterolithiasis (option C) is a postrenal cause.
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