Featured Research

from universities, journals, and other organizations

Sleep Apnea Common, But Undiagnosed, Among Pacemaker Patients

Date:
March 13, 2007
Source:
American Heart Association
Summary:
Almost 60 percent of pacemaker patients had undiagnosed sleep apnea -- possibly contributing to their heart disease -- researchers reported in a small study in Circulation: Journal of the American Heart Association.

Almost 60 percent of pacemaker patients had undiagnosed sleep apnea -- possibly contributing to their heart disease -- researchers reported in a small study in Circulation: Journal of the American Heart Association.

Related Articles


Moreover, more than 21 percent of the patients had severe sleep apnea, characterized by 30 or more periods of interrupted breathing each hour during sleep, said Patrick Lévy, M.D., Ph.D., senior author of the study and a professor physiology at Grenoble University in Grenoble, France.

"Because of the excessive prevalence of undiagnosed sleep apnea we found, it could be recommended that all patients referred for a pacemaker should first be screened for sleep apnea. Sleep apnea is known to increase risk of cardiovascular disease," Lévy said.

In the study, researchers investigated the prevalence and consequences of undiagnosed sleep apnea in pacemaker patients. Ninety-eight French, British and Belgian pacemaker patients (average age 64) who were undiagnosed with sleep apnea underwent laboratory monitoring of their sleep.

Twenty-nine patients had received pacemakers to treat heart failure, which means that the heart cannot efficiently pump blood. Thirty-three patients had a high degree atrioventricular block or AV block, which is a blocked electrical signal from the heart's upper chamber (atria) to the pumping chamber (ventricle).

Thirty-six had sinus node disease, in which a heart chamber pumps too fast or too slow.

Abnormally slow heart rhythms (Bradycardic rhythm disorders) are common among patients with obstructive sleep apnea.

Researchers screened the patients with the Epworth Sleepiness Scale and polysomnography, a device that records breathing and sleep. The pacemakers were programmed to pace the heart at a uniform lower pacing rate. Sleep apnea was defined as an apnea hypopnea (abnormally shallow breathing) index of 10 or more an hour.

Fifty seven patients (59 percent) had sleep apnea and 21 (21 percent) had severe sleep apnea, Lévy said. Half of the patients with heart failure, 68 percent of patients with AV block, and 58 percent of patients with sinus node disease had sleep apnea.

Previous studies have found that about one fifth of the general population has sleep apena, he said.

Researchers said they couldn't determine if the sleep apnea preceded the pacemaker implantation or if it developed after the initiation of pacemaker therapy. Lévy noted that successfully treating sleep apnea with weight loss, smoking cessation and continuous positive air pressure (CPAP) might eliminate the need for pacing. But additional studies are needed to define optimal treatment strategy for pacemaker patients who have obstructive or central sleep apnea.

Co-authors are lead author Stépane Garrigue, M.D., Ph.D.; Jean-Louis Pépin, M.D., Ph.D., Pascal Defaye, M.D.; Francis Murgatroyd, M.D.; Yann Poezevara, M.S. and Jacques Clémenty, M.D.


Story Source:

The above story is based on materials provided by American Heart Association. Note: Materials may be edited for content and length.


Cite This Page:

American Heart Association. "Sleep Apnea Common, But Undiagnosed, Among Pacemaker Patients." ScienceDaily. ScienceDaily, 13 March 2007. <www.sciencedaily.com/releases/2007/03/070312161127.htm>.
American Heart Association. (2007, March 13). Sleep Apnea Common, But Undiagnosed, Among Pacemaker Patients. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2007/03/070312161127.htm
American Heart Association. "Sleep Apnea Common, But Undiagnosed, Among Pacemaker Patients." ScienceDaily. www.sciencedaily.com/releases/2007/03/070312161127.htm (accessed December 22, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Monday, December 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Christmas Kissing Good for Health

Christmas Kissing Good for Health

Reuters - Innovations Video Online (Dec. 22, 2014) — Scientists in Amsterdam say couples transfer tens of millions of microbes when they kiss, encouraging healthy exposure to bacteria. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Brain-Dwelling Tapeworm Reveals Genetic Secrets

Brain-Dwelling Tapeworm Reveals Genetic Secrets

Reuters - Innovations Video Online (Dec. 22, 2014) — Cambridge scientists have unravelled the genetic code of a rare tapeworm that lived inside a patient's brain for at least four year. Researchers hope it will present new opportunities to diagnose and treat this invasive parasite. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Touch-Free Smart Phone Empowers Mobility-Impaired

Touch-Free Smart Phone Empowers Mobility-Impaired

Reuters - Innovations Video Online (Dec. 21, 2014) — A touch-free phone developed in Israel enables the mobility-impaired to operate smart phones with just a movement of the head. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Earthworms Provide Cancer-Fighting Bacteria

Earthworms Provide Cancer-Fighting Bacteria

Reuters - Innovations Video Online (Dec. 21, 2014) — Polish scientists isolate bacteria from earthworm intestines which they say may be used in antibiotics and cancer treatments. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins