In a new scientific study of the relationship between weather and myocardial infarction have all 274.000 registered heart attacks in Sweden between 1998 and 2013 were investigated.
the Number of heart attacks turned out to be 14 per cent higher at a temperature of 0 degrees than at a temperature of 20 degrees.
lifestyle factors such as smoking, sedentary lifestyle and unhealthy diet increases the risk of cardiovascular disease. But it takes 20-30 years to develop plaques in the blood vessels that cause heart attacks.
" So what is it that makes the placket bursting when bursting? We became interested in the external factors, " says David Erlinge, md and professor of cardiology at Lund university and Skåne university hospital.
" We were able to match the weather data with hjärtinfarkterna day-to-day. When we looked at what had significance, it was above all at low temperature.
Read more: Extreme cold depends on the weak polarvirvel
, low air pressure and few hours of sunshine had a certain importance, but not as big.
– some other väderfaktorer, such as rain or humidity had no meaning. No snow either, except in the northern region, where there was a certain connection.
Why the cold seems to put in the time process, you don't know for sure, but there are theories.
– When you are in the cold weather draws blood vessels in the skin constrict and the creation of a greater resistance in the heart, which will be higher charged. It can get the placket to crack, says David Erlinge.
probably relevant for all other hjärtåkommor, he thinks.
the heart must work against a higher pressure can certainly affect arrhythmias. In the next study, we shall merge the weather data with the registry for sudden death, often caused by an arrhythmia, the irregular heart beat.
As an active lifestyle reduces the risk of cardiovascular disease do not want the researchers to draw the conclusion that you want to sit inside when it is cold. It does not want to use the Heart-lung foundation, which funded the study.
The only call that we want to provide people with the reason of this study is that people with high risk for myocardial infarction should dress properly and possibly avoid exertion outdoors at low temperatures, " says the Heart-lung foundation's secretary-general Kristina Sparreljung.
the further research to get more knowledge about the causes.
Read more: at Least six deaths linked to extremkylan in the U.S.
A study published in the Lancet medical journal, 2015 going through the relationship between mortality and outdoor temperature in 13 countries, including Sweden. The proportion of deaths that can be linked to cold is where the 15 times higher than the proportion of deaths that can be linked to heating.
Also in the study of cardiac and vascular disorders as a major cause of överdödligheten.
– Yes, the studies support the each other. The uniqueness of our study is that we have such detailed data, " says David Erlinge.
between temperature and health focuses rather on what happens when it gets warmer.
" You don't want to say that the greenhouse effect is good for health, said Erlinge.
" But I think we humans are built to live in an even temperature of around 28 degrees. It is probably what in is set for.
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