An asymptomatic 38-year-old man comes to the GP for a follow-up examination. His blood pressure has been 150/90 on two previous visits. Cardiopulmonary examination shows no abnormalities. Serum creatinine is 1.1 mg/dL. Urinalysis shows 1+ protein and 3-4 RBCs/hpf. Which of the following is the most appropriate next step in management?
Echocardiography
Electrocardiography
Hydrochlorothiazide
Lisinopril
Urinary microscopy
