29th April 2024

A 55-year-old man with a history of heart failure and arthritis presents to the clinic with a 2-day history of lethargy, anorexia, and decreased urine output.

A 55-year-old man with a history of heart failure and arthritis presents to the clinic with a 2-day history of lethargy, anorexia, and decreased urine output. He takes lisinopril and NSAIDs regularly. His blood pressure is 110/70 mmHg, and physical examination reveals mild pedal edema. Blood tests show elevated serum creatinine and urea levels compared to his baseline values three months ago.

Which is the most likely diagnosis?