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Climate change affects health

07.10.2017

Climate change - namely, unpredictable temperature drops and pressure fluctuations - may increase the risk of heart failure and heart attack in older people, scientists say.

Researchers advise the elderly to avoid fogs and low winter clouds, and doctors are advised to pay attention not only to physiological indicators and patient complaints, but also to the weather.

A team of physiologists from two Canadian universities has found a link between colds and heart attacks in the elderly. After analyzing the medical records of 112 patients aged 65 and over who survived a heart attack, scientists found that older people are most often hospitalized with heart attacks from October to April. A drop in the thermometer by one degree increases the likelihood of death by an average of 0,7%, and by another 4,5% with an increase in pressure by 1 kPa. The statistics are not affected by geography (the figures turned out to be true for the entire territory of Canada) and patient history.

The nature of the relationship between cold and heart problems is not completely clear, but most likely it is vasoconstriction in response to a cold snap. The pressure of the blood on the walls of the vessels increases. In addition, when the body is cooled, hormones are actively produced that increase blood clotting, which increases the risk of blood clots.

In the body of healthy young people, all these processes do not lead to blockage of blood vessels, but the blood vessels of older people, in which lipid and protein metabolism is often difficult or disturbed, can react very sharply to weather changes, up to blockage or ruptures, including in the area heart muscle.

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