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The findings "highlight the effectiveness of CPAP treatment in reducing one of the most significant health issues [heart disease] associated with obstructive sleep apnea," the researchers concluded. CPAP stands for continuous positive airway pressure.
Previous research suggests that people with obstructive sleep apnea have greater activity in nerves associated with stress response, which can lead to high blood pressure and heart problems. This increased nerve activity is due to altered brain stem function caused by sleep apnea, earlier studies have shown.
In this small study, published recently in the Journal of Neurophysiology, Australian researchers found that CPAP treatment reduced that nerve activity by restoring normal brain stem function.
The study included 13 sleep apnea patients who were assessed before and after six months of CPAP treatment.
"These data strongly suggest that functional and anatomical changes within the brain stem, which we believe underlie the elevated sympathetic activity in individuals with untreated obstructive sleep apnea, can be restored to healthy levels by CPAP treatment," the University of Sydney researchers wrote.
-- Robert Preidt
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