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How a change in weather could trigger a STROKE: Very cold or humid temperatures can cause a fatal clot to develop
By Jenny Hope Medical Correspondent
PUBLISHED: 15:51 GMT, 12 February 2014 | UPDATED: 19:17 GMT, 12 February 2014
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People are more likely to have a stroke, and die from it, where there are big changes in air temperatures
Feeling under the weather? Changes in temperature may push up the risk of stroke, especially when it gets colder, warn researchers.
A new study found people are more likely to have a stroke, and die from it, where there are big changes in air temperatures and higher humidity.
But warmer weather cuts the risk of needing treatment in hospital for a stroke, and improves the chances of survival.
Cooler temperatures may trigger strokes because exposure to the cold has effects on the body ranging from increased blood pressure and constriction of blood vessels to the clotting tendency of platelets.
Wide variation in air temperatures over short time periods may have a similar impact, say US researchers.
Study leader Judith Lichtman, associate professor in Epidemiology at the Yale School of Public Health, said: 'Weather is not something people would typically associate with stroke risk; however, we've found weather conditions are among the multiple factors that are associated with stroke hospitalisations.'
Her team identified a nationwide sample of 134,510 people, 18 years and older, admitted to hospitals in 2009-10 for ischemic stroke, the most common type which is caused by a blood clot that blocks blood flow in or leading to the brain.
They compared the information with data on the weather including temperature and dew point - indicating higher air moisture and humidity - at the time.
The researchers found larger daily temperature changes and higher average humidity were associated with higher stroke hospitalisation rates.
More...
With each 1°F increase in average temperature, there was approximately a one per cent drop in the odds of stroke hospitalisation and dying in the hospital after stroke.
Increases in daily temperature fluctuation and average dew point pushed up the risk of going to hospital with a stroke, but not of dying in the hospital.
The research was presented at the American Stroke Association's International Stroke Conference in San Diego.
A CT scan of the brain after a stroke. Cooler temperatures may trigger strokes because exposure to the cold has various effects on the body. These range from increased blood pressure to thicker blood
Professor Lichtman said: 'This study suggests that meteorological factors such as daily fluctuations in temperature and increased humidity may be stressors that increase stroke hospitalisations.
'People at risk for stroke may want to avoid being exposed to significant temperature changes and high dew point and, as always, be prepared to act quickly if they or someone they know experiences stroke signs and symptoms.
'Future research is needed to better understand the cause and effect of changes in weather conditions, as well as to explore potential mechanisms for this association.'
A study of almost 2,000 stroke patients in Russia found a 30 per cent extra risk on cooler days compared with warmer days.
Previous research analysing almost 20 international studies found low air pressure and cold weather is linked to increasing joint pain and stiffness.
Dr Madina Kara, neuroscientist at the Stroke Association, said 'This research suggests that low temperatures increase peoples' risk of stroke, and can lead to more patients dying after a stroke.
Changes in temperature may push up the risk of stroke, especially when it gets colder
'Previous studies have indicated that that colder temperatures can be linked to increased blood pressure, especially in older people.
'High blood pressure is the biggest risk factor for stroke and it is essential that people have regular checks to make sure their blood pressure is under control.
'Although we still don't fully understand why blood pressure rises during the winter, it is believed that cold weather can cause arteries to constrict and the blood to thicken, meaning that the blood has to be pumped harder in order to travel around the body.
'In the cold weather the Stroke Association recommends that people should take extra precautions to stay warm and reduce their risk of stroke.'
Read more: http://www.dailymail.co.uk/health/a...s-cause-fatal-clot-develop.html#ixzz2tDxt6XsW
Follow us: @MailOnline on Twitter | DailyMail on Facebook
How a change in weather could trigger a STROKE: Very cold or humid temperatures can cause a fatal clot to develop
By Jenny Hope Medical Correspondent
PUBLISHED: 15:51 GMT, 12 February 2014 | UPDATED: 19:17 GMT, 12 February 2014
20
View
comments
http://www.dailymail.co.uk/health/a...atures-cause-fatal-clot-develop.html#comments
People are more likely to have a stroke, and die from it, where there are big changes in air temperatures
Feeling under the weather? Changes in temperature may push up the risk of stroke, especially when it gets colder, warn researchers.
A new study found people are more likely to have a stroke, and die from it, where there are big changes in air temperatures and higher humidity.
But warmer weather cuts the risk of needing treatment in hospital for a stroke, and improves the chances of survival.
Cooler temperatures may trigger strokes because exposure to the cold has effects on the body ranging from increased blood pressure and constriction of blood vessels to the clotting tendency of platelets.
Wide variation in air temperatures over short time periods may have a similar impact, say US researchers.
Study leader Judith Lichtman, associate professor in Epidemiology at the Yale School of Public Health, said: 'Weather is not something people would typically associate with stroke risk; however, we've found weather conditions are among the multiple factors that are associated with stroke hospitalisations.'
Her team identified a nationwide sample of 134,510 people, 18 years and older, admitted to hospitals in 2009-10 for ischemic stroke, the most common type which is caused by a blood clot that blocks blood flow in or leading to the brain.
They compared the information with data on the weather including temperature and dew point - indicating higher air moisture and humidity - at the time.
The researchers found larger daily temperature changes and higher average humidity were associated with higher stroke hospitalisation rates.
More...
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With each 1°F increase in average temperature, there was approximately a one per cent drop in the odds of stroke hospitalisation and dying in the hospital after stroke.
Increases in daily temperature fluctuation and average dew point pushed up the risk of going to hospital with a stroke, but not of dying in the hospital.
The research was presented at the American Stroke Association's International Stroke Conference in San Diego.
Professor Lichtman said: 'This study suggests that meteorological factors such as daily fluctuations in temperature and increased humidity may be stressors that increase stroke hospitalisations.
'People at risk for stroke may want to avoid being exposed to significant temperature changes and high dew point and, as always, be prepared to act quickly if they or someone they know experiences stroke signs and symptoms.
'Future research is needed to better understand the cause and effect of changes in weather conditions, as well as to explore potential mechanisms for this association.'
A study of almost 2,000 stroke patients in Russia found a 30 per cent extra risk on cooler days compared with warmer days.
Previous research analysing almost 20 international studies found low air pressure and cold weather is linked to increasing joint pain and stiffness.
Dr Madina Kara, neuroscientist at the Stroke Association, said 'This research suggests that low temperatures increase peoples' risk of stroke, and can lead to more patients dying after a stroke.
'Previous studies have indicated that that colder temperatures can be linked to increased blood pressure, especially in older people.
'High blood pressure is the biggest risk factor for stroke and it is essential that people have regular checks to make sure their blood pressure is under control.
'Although we still don't fully understand why blood pressure rises during the winter, it is believed that cold weather can cause arteries to constrict and the blood to thicken, meaning that the blood has to be pumped harder in order to travel around the body.
'In the cold weather the Stroke Association recommends that people should take extra precautions to stay warm and reduce their risk of stroke.'
Read more: http://www.dailymail.co.uk/health/a...s-cause-fatal-clot-develop.html#ixzz2tDxt6XsW
Follow us: @MailOnline on Twitter | DailyMail on Facebook
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..got a be at Least 10.80 euros..then there is the Aunty Mossy Consultation Fee....hmmm..
H Reading..?:....
