A 22-year-old woman comes to the physician for a follow-up examination following a blood pressure measurement of 160/100 two weeks ago. Repeat measurement today is 158/100. MR angiography of the renal arteries confirms a diagnosis of fibromuscular dysplasia. Serum studies and MR angiogram are shown:
Sodium 140 mEq/L
Potassium 4.2 mEq/L
Bicarbonate 25 mEq/L
pH 7.40
Which of the following is most likely to be seen in this patient?