What is the variability of plasma norepinephrine levels?
May 23, 2007 9:14 AM Subscribe
Does plasma norepinephrine stay relatively constant, or does it fluctuate a lot?
posted by wireless to Health & Fitness (4 answers total) 1 user marked this as a favorite
Because of some physical symptoms, I suspect I might have high sympathetic nervous system activity. So, I got a prescription from my doctor for a plasma norepinephrine test. The only thing is that I'm wondering how much the test results will be affected by transient factors, such as time of day and momentary stress levels. In other words, is plasma NE comparably variable to, say, heart rate? If so, how can I get a reliable assessment of my levels of synaptic norepinephrine?
Note: I also got a prescription for 24-hour urine catecholamine levels, in case that's more useful.