Featured Research

from universities, journals, and other organizations

Undiagnosed OSA Patients Have Altered Cardiovascular Responses During Exercise Recovery

Date:
January 8, 2008
Source:
American Academy of Sleep Medicine
Summary:
People with untreated obstructive sleep apnea have altered cardiovascular responses during recovery from maximal exercise. These results suggest an imbalance in the autonomic control of heart rate during recovery, and may be an early clinical sign of the progression of OSA.

A new study finds that people with untreated obstructive sleep apnea (OSA) have altered cardiovascular responses during recovery from maximal exercise. These results suggest an imbalance in the autonomic control of heart rate during recovery, and may be an early clinical sign of the progression of OSA.

Related Articles


The study, authored by Trent A. Hargens, PhD, of Virginia Tech, focused on 44 individuals: 14 overweight with OSA (OSA), 16 overweight without OSA (No-OSA) and 14 normal weight without OSA (Control). All were between the ages of 18 and 26. The subjects performed maximal ramping exercise testing on a cycle ergometer with five minutes of active recovery. Exercise measurements included heart rate, blood pressure, respiratory exchange ratio and oxygen consumption.

According to the results, in OSA patients, heart rate recovery was significantly weakened compared to the No-OSA and control groups throughout recovery. No differences were noted in the heart rate or blood pressure response to exercise in any group.

"We believe our study is the first study to show blunted post-exercise heart rate recovery in young apparently healthy young men who have latent obstructive sleep apnea. Mechanistic studies by other investigators suggest that this response is a function of impaired vagal reactivation following vigorous exercise which is a marker specific to the autonomic dysfunction of sleep apnea," said William G. Herbert, PhD, a co-author of the study. "Given these results were observed in young men, follow-up confirmation with large cohorts may support use of this marker for identifying men at early risk of sleep apnea and for monitoring therapy in those already being treated for this common but under-diagnosed disorder."

OSA is a sleep-related breathing disorder that causes your body to stop breathing during sleep. OSA occurs when the tissue in the back of the throat collapses and blocks the airway. This keeps air from getting into the lungs. It is estimated that four percent of men and two percent of women have OSA, and millions more remain undiagnosed. On average, most adults need seven to eight hours of sleep each night to feel alert and well-rested.

First introduced as a treatment option for sleep apnea in 1981, continuous positive airway pressure (CPAP) is the most common and effective treatment for OSA. CPAP provides a steady stream of pressurized air to patients through a mask that they wear during sleep. This airflow keeps the airway open, preventing the pauses in breathing that characterize sleep apnea and restoring normal oxygen levels.

Those who think they might have OSA, or another sleep disorder, are urged to consult with their primary care physician or a sleep specialist.

The article entitled, "Attenuated Heart Rate Recovery Following Exercise Testing in Overweight Young Men with Untreated Obstructive Sleep Apnea," is published in the January 1 issue of the journal Sleep.


Story Source:

The above story is based on materials provided by American Academy of Sleep Medicine. Note: Materials may be edited for content and length.


Cite This Page:

American Academy of Sleep Medicine. "Undiagnosed OSA Patients Have Altered Cardiovascular Responses During Exercise Recovery." ScienceDaily. ScienceDaily, 8 January 2008. <www.sciencedaily.com/releases/2008/01/080101093842.htm>.
American Academy of Sleep Medicine. (2008, January 8). Undiagnosed OSA Patients Have Altered Cardiovascular Responses During Exercise Recovery. ScienceDaily. Retrieved October 31, 2014 from www.sciencedaily.com/releases/2008/01/080101093842.htm
American Academy of Sleep Medicine. "Undiagnosed OSA Patients Have Altered Cardiovascular Responses During Exercise Recovery." ScienceDaily. www.sciencedaily.com/releases/2008/01/080101093842.htm (accessed October 31, 2014).

Share This



More Health & Medicine News

Friday, October 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Melafind: Spotting Melanoma Without a Biopsy

Melafind: Spotting Melanoma Without a Biopsy

Ivanhoe (Oct. 31, 2014) The MelaFind device is a pain-free way to check suspicious moles for melanoma, without the need for a biopsy. Video provided by Ivanhoe
Powered by NewsLook.com
Battling Multiple Myeloma

Battling Multiple Myeloma

Ivanhoe (Oct. 31, 2014) The answer isn’t always found in new drugs – repurposing an ‘old’ drug that could mean better multiple myeloma treatment, and hope. Video provided by Ivanhoe
Powered by NewsLook.com
Chronic Inflammation and Prostate Cancer

Chronic Inflammation and Prostate Cancer

Ivanhoe (Oct. 31, 2014) New information that is linking chronic inflammation in the prostate and prostate cancer, which may help doctors and patients prevent cancer in the future. Video provided by Ivanhoe
Powered by NewsLook.com
Sickle Cell: Stopping Kids’ Silent Strokes

Sickle Cell: Stopping Kids’ Silent Strokes

Ivanhoe (Oct. 31, 2014) Blood transfusions are proving crucial to young sickle cell patients by helping prevent strokes, even when there is no outward sign of brain injury. Video provided by Ivanhoe
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