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406 Anaesthesia

Acute renal failure occurs following aoic angiography in a 72-year-old man. His weight has been rising, his lungs show rales at both bases, and he is dyspneic. His fractional excretion of sodium is greater than 1. He has eosinophilia on his peripheral smear, an elevated erythrocyte sedimentation rate, and proteinuria with microscopic hematuria. Which of the following is the most likely cause of his renal failure?

AHypovolemia
BRenal aery cholesterol embolism
CAcute tubular necrosis
DCardiogenic shock
Anaesthesia
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