Featured Research

from universities, journals, and other organizations

Sleep-related Breathing Disorder Linked To Increased Heart Rate Variability

Date:
November 5, 2007
Source:
American Academy of Sleep Medicine
Summary:
A sleep-related breathing disorder, common in heart failure, increases one's heart rate variability. Further, central sleep apnea and obstructive sleep apnea produce different patterns of heart rate variability, which are likely to reflect the different pathophysiological mechanisms involved.

A sleep-related breathing disorder, common in heart failure, increases one's heart rate variability. Further, central sleep apnea (CSA) and obstructive sleep apnea (OSA) produce different patterns of heart rate variability, which are likely to reflect the different pathophysiological mechanisms involved, according to a new study.

Matthew T. Naughton, MD, of Alfred Hospital and Monash University in Melbourne, Australia, evaluated 21 patients with heart failure who were referred for polysomnography for investigation of a sleep-related breathing disorder. For each subject, two conditions were examined: a sleep-related breathing disorder and stable breathing.

There were three main findings of this study:

  1. Within the subjects, the transition from stable breathing to a sleep-related breathing disorder was associated with an increase in heart rate variability, as well as an increase in the low frequency/high frequency ratio.
  2. No difference in heart rate variability was found from samples taken from the beginning and end of the sleep period and, importantly, no evidence that cardiac autonomic regulation altered during the night independent of a sleep-related breathing disorder.
  3. OSA and CSA produced different patterns of heart rate variability, with OSA showing increased absolute high frequency power and reduced very low frequency percentage compared with CSA.

"Heart rate patterns are influenced enormously by breathing patterns," said Dr. Naughton. "In heart failure patients during sleep, this information might be able to determine the presence or absence and type of sleep apnea. This could be useful in determining the stability of heart failure (and therefore predict a decline in heart function and signal when additional anti-heart failure therapies are required) and also signal when alternative therapies may be required (such as those directed towards treating OSA). Further work is required in this field."

OSA is a sleep-related breathing disorder that causes one's body to stop breathing during sleep. OSA occurs when the tissue in the back of the throat collapses and blocks the airway, preventing air from getting into the lungs.

CSA is a breathing disorder that causes one's body to decrease or stop the effort of breathing during sleep. This occurs in an off-and-on cycle. It is a result of a problem in the brain or heart. It is different from OSA because the problem is not caused by a blockage of the airway.

Scientific evidence shows that continuous positive airway pressure (CPAP) is the best treatment for sleep apnea. 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. CPAP users often express dramatic improvements in how they feel. They are more alert, have more energy and are able to perform at higher levels for longer periods of time.

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

The journal article is entitled, "Sleep Apnea in Heart Failure Increases Heart Rate Variability and Sympathetic Dominance", and was published in Sleep, November 1, 2007.


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. "Sleep-related Breathing Disorder Linked To Increased Heart Rate Variability." ScienceDaily. ScienceDaily, 5 November 2007. <www.sciencedaily.com/releases/2007/11/071101085021.htm>.
American Academy of Sleep Medicine. (2007, November 5). Sleep-related Breathing Disorder Linked To Increased Heart Rate Variability. ScienceDaily. Retrieved April 24, 2014 from www.sciencedaily.com/releases/2007/11/071101085021.htm
American Academy of Sleep Medicine. "Sleep-related Breathing Disorder Linked To Increased Heart Rate Variability." ScienceDaily. www.sciencedaily.com/releases/2007/11/071101085021.htm (accessed April 24, 2014).

Share This



More Mind & Brain News

Thursday, April 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Could Marijuana Use Lead To Serious Heart Problems?

Could Marijuana Use Lead To Serious Heart Problems?

Newsy (Apr. 24, 2014) A new study says marijuana use could lead to serious heart-related complications. Video provided by Newsy
Powered by NewsLook.com
Study Says Most Crime Not Linked To Mental Illness

Study Says Most Crime Not Linked To Mental Illness

Newsy (Apr. 22, 2014) A new study finds most crimes committed by people with mental illness are not caused by symptoms of their illness or disorder. Video provided by Newsy
Powered by NewsLook.com
How Smaller Plates And Cutlery Could Make You Feel Fuller

How Smaller Plates And Cutlery Could Make You Feel Fuller

Newsy (Apr. 22, 2014) NBC's "Today" conducted an experiment to see if changing the size of plates and utensils affects the amount individuals eat. Video provided by Newsy
Powered by NewsLook.com
Do We Get Nicer With Age?

Do We Get Nicer With Age?

Newsy (Apr. 22, 2014) A recent report claims personality can change over time as we age, and usually that means becoming nicer and more emotionally stable. Video provided by Newsy
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:
from the past week

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