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Sleep Apnea Health Center

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Bringing Sleep, Heart Health Together

WebMD Health News
Reviewed by Gary D. Vogin, MD

Feb. 6, 2002 -- A pacemaker may never become a treatment for the symptoms of sleep apnea, but researchers studying people who have pacemakers are finding that the pace at which the heart beats during sleep can improve apnea symptoms. And other researchers have developed a simple, FDA-approved device that can make it much easier to find out whether you have a sleep disorder.

In a new study, French researchers report in TheNew England Journal of Medicine that the symptom of repeated nighttime waking that apnea sufferers live with can be reduced in certain heart patients who have pacemakers.

When you have apnea, your throat closes down during sleep. When the body can't force air through the closed throat, it briefly wakes you in an effort to restore normal breathing. But the process of trying to force breathing places stress on the heart. In the long term, this stress can lead to high blood pressure and other heart troubles even though the patient often has no recollection of waking.

"Obstructive sleep apnea [OSA] appears to be one cause of high blood pressure," says Daniel Gottlieb, MD, MPH, a professor in the Boston University School of Medicine who wrote an editorial accompanying the heart-pacing study. "There is also increasing evidence that OSA contributes to the risk of heart attack, stroke, and congestive heart failure, although this is less certain."

More Beats, Improved Sleep

The French researchers, led by Stephane Garrigue, MD, MS, assistant professor at the Hospital Cardiologique du Haut-Leveque at the University of Bordeaux, studied 16 sleep apnea patients who have bradycardia, a disorder in which the heart beats faster than it should because of overstimulation of the vagus nerve.

"What we found was that by increasing the atrial pacing rate, [the overstimulation of the nerve] is counteracted and number of sleep apnea episodes decreased," said Garrigue in an email interview. "By increasing the pacing rate 15 pulses per minute over the [patient's usual nighttime rate], we observed a significant reduction in all types of sleep apnea."

Gottlieb says that though the French team's findings are interesting, they need to be replicated in other studies.

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