Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Patients with severe sleep-disordered breathing have high odds of abnormal heart rhythms

18.04.2006


Patients with severe sleep-disordered breathing are two to four times more likely to experience complex, abnormal heart rhythms while sleeping than individuals without the problem, according to the Sleep Heart Health Study (SHHS).



These findings appear in the April 15 issue of the American Journal of Respiratory and Critical Care Medicine, published by the American Thoracic Society.

Reena Mehra, M.D., M.S., of University Hospitals of Cleveland at Case Western Reserve University in Ohio, and seven associates compared the prevalence of arrhythmias in 228 patients with sleep-disordered breathing and 338 with no sleep disorder. The individuals in both groups participated in the SHHS, a multi-center longitudinal study of designed to determine the cardiovascular consequences of sleep-disordered breathing (SDB).


SDB is an illness in which a sleeping individual repeatedly stops breathing for 10 seconds or longer before resuming air intake. These stoppages decrease the amount of oxygen and increase the level of carbon dioxide in the blood and brain. In this study, participants with SDB had a respiratory disturbance index that averaged about 44 pauses per hour of sleep. The control subjects experienced only 2.8 interruptions per hour.

"Individuals with sleep-disordered breathing had four times the odds of atrial fibrillation and three times the odds of nonsustained ventricular tachycardia," said Dr. Mehra.

Atrial fibrillation consists of very rapid contractions of the atria (the upper chambers of the heart), leading the ventricles (the lower chambers of the heart) to beat irregularly. This results in decreased heart output and potential for clot formation. Tachycardia is defined by abnormally rapid heart beats--over 100 beats per minute in an adult.

"Consistent with the study design, no sex or race differences were observed between groups," said Dr. Mehra. "However, the SDB group was modestly older and had a higher body mass index than the control patients." She added that arrhythmias generally tended to occur during sleep as opposed to periods of wakefulness.

The investigation included a detailed assessment of the existing cardiovascular risk factors and/or disease in all participants.

"The results of this study have potentially important clinical implications because they suggest an increased vulnerability to nocturnal cardiac arrhythmias in individuals with SDB and provide an explanation for the observed increase in sudden nocturnal death recently reported with sleep apnea," said Dr. Mehra.

Suzy Martin | EurekAlert!
Further information:
http://www.thoracic.org

More articles from Studies and Analyses:

nachricht Real-time feedback helps save energy and water
08.02.2017 | Otto-Friedrich-Universität Bamberg

nachricht The Great Unknown: Risk-Taking Behavior in Adolescents
19.01.2017 | Max-Planck-Institut für Bildungsforschung

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Biocompatible 3-D tracking system has potential to improve robot-assisted surgery

17.02.2017 | Medical Engineering

Real-time MRI analysis powered by supercomputers

17.02.2017 | Medical Engineering

Antibiotic effective against drug-resistant bacteria in pediatric skin infections

17.02.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>