A test for catecholamines measures the amount of the hormones epinephrine, norepinephrine, and dopamine
www.webmd.com/hypertension-high-blood-pressure/catecholamines-in-blood"Catecholamines help the body respond to stress or fright and prepare the body for "fight-or-flight" reactions.
The adrenal glands make large amounts of catecholamines as a reaction to stress. The main catecholamines are epinephrine (adrenaline), norepinephrine (noradrenaline), and dopamine. They break down into vanillylmandelic acid (VMA), metanephrine, and normetanephrine. Metanephrine and normetanephrine also may be measured during a catecholamine test."