Abstract:
:Numerous alterations in the sympathetic nervous system have been reported in patients with obstructive sleep apnea. It is unclear whether such alterations can be attributed to the respiratory disturbance itself, the resulting hypoxia, or disruption of sleep. We examined urinary norepinephrine levels in 45 individuals with varying amounts of respiratory disturbance and sleep disruption. All were of similar age (40 to 60 years) and body weight (100 to 160% ideal body weight), and all were free from antihypertensive medications that could influence norepinephrine levels. Twenty-four-hour urinary norepinephrine levels were correlated with respiratory disturbance index (r = 0.39, p < 0.01) and mean oxygen saturation (r = -0.36, p < 0.05). These variables, together with the time in slow-wave sleep, accounted for a statistically significant but modest percentage of the variance in urinary norepinephrine (R2 = 0.19, p < 0.05). However, the variables were so tightly intercorrelated that no single variable independently predicted norepinephrine levels in multiple regression analysis.
journal_name
Chestjournal_title
Chestauthors
Dimsdale JE,Coy T,Ancoli-Israel S,Mills P,Clausen J,Ziegler MGdoi
10.1378/chest.111.3.639subject
Has Abstractpub_date
1997-03-01 00:00:00pages
639-42issue
3eissn
0012-3692issn
1931-3543pii
S0012-3692(15)46815-1journal_volume
111pub_type
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