A 54-Year-Old Man Hospitalized with an Acute Myocardial Infarction Goes

A 54-year-old man hospitalized with an acute myocardial infarction goes into cardiac arrest.  The patient is resuscitated successfully and transferred to the cardiac intensive care unit where he remains hemodynamically stable.  However, on the second day of hospitalization, his urine flow diminishes to 400 mL/day.  Blood pressure is 115/68 mm Hg and pulse is 78/min.  Laboratory results are as follows: Urine sediment microscopy reveals muddy brown casts.  Which of the following renal structures are most likely to demonstrate signs of ischemic injury?

A) Collecting ducts
B) Distal tubules
C) Glomeruli
D) Proximal tubules
E) Renal papillae

Correct Answer:

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