Which is least likely to be elevated in patients with a pheochromocytoma?: (A) Systemic aerial diastolic pressure, (B) Systemic aerial systolic pressure, (C) Serum norepinephrine, (D) Intravascular volume
Answer is D. Pheochromocytoma is producing Nor epinephrine & Epinephrine which increases the systolic and diastolic pressure. * Also Nor epinephrine would be higher D/T extreme vasoconstriction the intravascular volume of the patient will be significantly reduced and not elevated.