urine catecholamine level urine norepinephrine level 2013-06-14T16:14:22Z CMO:0001629 JSmith Measurement of the amount of norepinephrine, a catecholamine hormone and neurotransmitter, secreted by the adrenal medulla and the nerve endings of the sympathetic nervous system, that causes vasoconstriction and increases heart rate, blood pressure, and blood sugar level, in a specified sample of urine, the fluid waste product excreted by the kidneys. VT:0010605 clinical_measurement_ontology urine noradrenalin level