USMLE Step 2 Quiz
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NEUROLOGY
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An 80-year-old resident of a nursing home is brought to the emergency department for altered mental status. For the past two days, he has been confused and lethargic. He has a history of dementia and atrial fibrillation, for which he takes donepezil and dabigatran. On examination, he is somnolent and does not follow commands. There is no clear focal deficit. Laboratory studies show a creatinine of 2.5 mg/dL (baseline 1.2 mg/dL). A non-contrast head CT shows no acute intracranial process.
The patient's acute neurologic decline is most likely a complication of which of the following?
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