Sleep apnea plays dual role in stroke
Improvements to the diagnosis and screening of sleep apnea are critical to stroke prevention, according to new stroke care guidelines released today at the Canadian Stroke Congress.
Obstructive sleep apnea, a disorder where the flow of air to the brain pauses or decreases during sleep, is both a risk factor for stroke and a complication following stroke, according to the Canadian Best Practice Recommendations for Stroke Care.
At absolute minimum, four per cent of men and two per cent of women have serious sleep apnea, says Dr. Brian Murray, an associate professor of neurology and sleep medicine at the University of Toronto. Dr. Murray adds that clinically significant forms of the disorder affect more than 10 per cent of the population.
"There are ways to prevent sleep apnea from occurring," says Dr. Murray. "Keep your body weight low as obesity is a major contributor to sleep apnea; avoid medications and substances that relax the airways and cause snoring, such as sedatives and alcohol; and sleeping on your side can minimize sleep disordered breathing."
Signs of sleep apnea include significant snoring, pauses in breathing during sleep and daytime fatigue despite adequate sleep time. If any of these symptoms are present, says Dr. Murray, you should be evaluated by your doctor to determine next steps.
Obstructive sleep apnea is common after stroke. According to the updated best practice recommendations, at least 60 per cent of stroke patients experience sleep apnea. The new recommendations call for more screening of stroke patients who say they experience snoring, fragmented sleep or fatigue. Although, in many cases with stroke patients, daytime fatigue does not appear as a symptom, says Dr. Murray.
It is crucial for stroke patients to be screened for sleep apnea because untreated sleep apnea increases the chances of a second stroke and small studies have found that stroke patients with sleep apnea tended to have worse rehabilitation outcomes, says Dr. Murray.
The best practices also describe "higher rates of mortality and other complications in patients with stroke and untreated obstructive sleep apnea."
"This innovative Canadian research continues to show that there is more to learn about rehabilitation and recovery following stroke," says Ian Joiner, director of stroke for the Heart and Stroke Foundation. "Reflecting these advances in tools such as the Best Practices Recommendations for Stroke Care will help improve outcomes for Canadians."
The new recommendations are the fourth update to the Canadian Best Practice Recommendations for Stroke Care and this is the first time the recommendations have included a section on sleep apnea. The best practices were first released in 2006 to improve stroke care for Canadians living with stroke and future stroke patients. They are updated every two years.
"The new recommendations take stroke care a step further," says Dr. Michael Hill, Canadian Stroke Congress Co-Chair. "Stroke care is not only about giving the best possible treatment to patients. It is also about preventing new and recurrent strokes."
The Canadian Stroke Congress is a joint initiative of the Canadian Stroke Network, Heart and Stroke Foundation of Canada and the Canadian Stroke Consortium.
Provided by Heart and Stroke Foundation of Canada
- Sleep apnea linked to silent strokes, small lesions in brain Feb 01, 2012 | not rated yet | 0
- Study finds that obstructive sleep apnea causes earlier death in stroke patients May 19, 2008 | not rated yet | 0
- Poor sleep quality leads to poorer prognosis after stroke Apr 28, 2009 | not rated yet | 0
- Is that sleepiness during pregnancy normal or a sign of sleep apnea? Feb 10, 2012 | not rated yet | 0
- Bariatric patients with obstructive sleep apnea fail to show symptoms Aug 09, 2012 | not rated yet | 0
- Motion perception revisited: High Phi effect challenges established motion perception assumptions Apr 23, 2013 | 3 / 5 (2) | 2
- Anything you can do I can do better: Neuromolecular foundations of the superiority illusion (Update) Apr 02, 2013 | 4.5 / 5 (11) | 5
- The visual system as economist: Neural resource allocation in visual adaptation Mar 30, 2013 | 5 / 5 (2) | 9
- Separate lives: Neuronal and organismal lifespans decoupled Mar 27, 2013 | 4.9 / 5 (8) | 0
- Sizing things up: The evolutionary neurobiology of scale invariance Feb 28, 2013 | 4.8 / 5 (10) | 14
Basic physics understanding. Could someone explain?
2 hours ago I'm trying to get a grip on some classic physics by watching a Stanford lecture. I've made it through the first one, and now in the second one all...
Change in flux of a transformer
2 hours ago Hello, As I understand, a simple transformer works by using the Input AC in the primary coil to generate magnetic field in the iron core, which...
Electric field between parallel plate capacitor
3 hours ago If you have an infinite non-conducting plate, the electric field just outside is equal to sigma / 2*epsilon. The electric field just outside a...
Why angle of projectile has 2 solutions?
3 hours ago I have the final answer of: sin2(theta) = 0.871 why does (theta) = 30.3 deg OR (theta) = 59.7 deg I get why this could be physically, but...
How much negative charge do I accumulate by touching the earth?
5 hours ago The Earth carries a negative electric charge of roughly 500 thousand Coulombs (according to different sources I've seen). If I touch the Earth I...
Indeterminism in Classical Physics
10 hours ago I was reading the Roger Penrose book Emperor's New Mind and he was explaining the determinism in Newtonian mechanics. He says that if we consider...
- More from Physics Forums - Classical Physics
More news stories
A new study from researchers in Japan indicates that obstructive sleep apnea (OSA) is independently associated with visceral (abdominal) fat accumulation only in men, perhaps explaining gender differences in the impact of ...
Sleep apnea May 22, 2013 | not rated yet | 0
Children with obstructive sleep apnea who had a common surgery to remove their tonsils and adenoids showed notable improvements in behavior, quality of life and other symptoms compared to those treated with "watchful waiting" ...
Sleep apnea May 21, 2013 | 5 / 5 (1) | 0
Many studies have shown that men and women who suffer from obstructive sleep apnea (OSA) - a disorder that causes breathing to halt intermittently during sleep – have a higher mortality rate than those who do not have the ...
Sleep apnea May 20, 2013 | not rated yet | 0
Optimal treatment of sleep apnea in patients with prediabetes improves blood sugar (glucose) levels and thus can reduce cardiometabolic risk, according to a study to be presented at the ATS 2013 International Conference in ...
Sleep apnea May 20, 2013 | not rated yet | 0 |
Researchers at the University of Wisconsin have identified a potential new risk factor for obstructive sleep apnea: asthma. Using data from the National Institutes of Health (Heart, Lung, and Blood Institute)-funded Wisconsin ...
Sleep apnea May 19, 2013 | 5 / 5 (1) | 0 |
(Medical Xpress)—A new study by researchers in the US has shown that an ancient virus can be modified to help in the fight against the simian immunodeficiency virus SIV, which is the equivalent in monkeys ...
8 hours ago | 5 / 5 (3) | 0 |
Two mutations central to the development of infantile myofibromatosis (IM)—a disorder characterized by multiple tumors involving the skin, bone, and soft tissue—may provide new therapeutic targets, according to researchers ...
2 hours ago | 5 / 5 (1) | 0 |
Women at a particular stage in their monthly menstrual cycle may be more vulnerable to some of the psychological side-effects associated with stressful experiences, according to a study from UCL.
5 hours ago | 5 / 5 (1) | 0 |
Biological processes are generally based on events at the molecular and cellular level. To understand what happens in the course of infections, diseases or normal bodily functions, scientists would need to ...
6 hours ago | 5 / 5 (2) | 0 |
(Medical Xpress)—Regulating the distribution of power in neurons is done by a system that makes the national electric grid look simple by comparison. Each neuron has several thousand mitochondria confined ...
May 23, 2013 | 4.9 / 5 (9) | 0 |
Talking on a hands-free device while behind the wheel can lead to a sharp increase in errors that could imperil other drivers on the road, according to new research from the University of Alberta.
2 hours ago | not rated yet | 0