A 54-year-old woman comes to the physician for a one-week history of increased swelling of her lower extremities and shortness of breath. She has history of type II diabetes mellitus and hypertension. Two weeks ago, she was treated for a urinary tract infection with amoxicillin. At the time, lisinopril was also commenced. Vitals are: temperature 98.6F, HR 110, RR 18, BP 180/100. Auscultation of the chest demonstrates an S3 heart sound and diffuse bilateral crackles. There is 2+ pretibial pitting edema bilaterally. Laboratory studies show:
Serum blood urea nitrogen 50 mg/dL
Serum creatinine 4.1 mg/dL
Urine blood None
Which of the following is the most likely diagnosis?
