A 69-year-old woman comes to the physician for a routine health maintenance examination. Blood pressure is 160/100, up from 145/90 one year ago. A carotid bruit is heard on auscultation. Which of the following is most likely to confirm the diagnosis in this patient?
Adrenal venous sampling
Biopsy of the adrenal gland
CT of the abdomen with contrast
Magnetic resonance angiography
Serum studies
