A 49-year-old man presents to the physician for an 8-month history of progressively worsening fatigue and darkening of the skin of his chest, back, and arms. Serum sodium is 129 mEq/L. A cosyntropin test confirms the diagnosis. Which of the following is most likely to be seen in this patient?
Decreased angiotensin II
Decreased catecholamine effects on arterioles
Decreased renin
Decreased serum corticotropin-releasing hormone concentration
Increased urinary potassium
