The risk of heart attack: Why rises in winter.
Several studies suggest that during winter, the risk of stroke, heart failure, cardiovascular issues, arrhythmia, and disorders rises several times.
Many top cardiologists think that it happens due to the body’s physiology and the temperature drop that impacts the heart’s physiology and the temperature drop that impacts the heart’s functionality.
According to a study by JAMA Cardiology, a monthly peer-reviewed medical journal, which analyzed information on about 274000 people living in Sweden in 2018, the risk of having a heart attack was greatest on a day when the temperature was below freezing point.
PLOS One, open access scientific journal, in a study in 2015 found more than 31 percent increase in heart me attacks in the coldest months of the year compared with at the warmest. Several studies suggest that during extremely cold conditions, the risk of getting a stroke increases by s 80 percent, particularly when the temperature dips below 15 degrees Celsius.
As temperatures drop, the blood vessels tighten and blood flow speeds up to help stay warm. That is why the blood pressure is often higher in colder seasons, opines cardiologists. “Onset of winters can evoke mixed reactions. As per some study, the chances of a person suffering from a heart attack goes up nearly 33 percent during
winters. The Coronary arteries like other arteries can constrict during winter which can lead to a poor supply of blood to the heart muscle. Decreased blood dial ischemia and heart attack can precipitate.
There is increased blood volume during winters. As in summer, there is increased fluid loss through sweat which is missing in winters. It can lead to increase salt and fluid retention during winter which can lead to an increase in blood pressure and heart attacks.
“Because of hormonal variations during winters, there is an increase in levels of clotting factors including fibrinogen. Adding fuel to fire is vasoconstriction and platelet aggregability along with clotting factors which can lead to an increased tendency for clot formation and heart attacks.
Increased calorie intake and decreased physical activity can attack myriad physical changes in the body. including weight gain and vascular changes which can provide a milieu for clot formation and heart attack, adding that the elderly, alcoholics, smokers, people with sedentary lifestyles are more at risk.
While talking about precautions, he advised to reduce exposure to cold, avoid excessive alcohol intake and there should not be coal-based or faulty heating appliances in closed rooms. He was also advised to go for regular physical activity and blood pressure and blood sugar level checkups after regular intervals.
Director Neurointervention. Artemis Agrim Institute of Neurosciences said: “One of the prime reasons can be attributed that during the cold season the blood vessels constrict, which leads to an increase in blood pressure, which means that the blood has to be really
pumped harder to travel around the body, making it one of the major factors for the onset of stroke”.
“Also, there are various changes in the chemical balance in our body during winter including cholesterol levels and some other factors that increase the chances of clotting.
Changes in physical activity which usually decreases during the winter months as well as weight gain can play a role. Probably this is the reason stroke cases go up by 11 percent during winter,
Low temperature constricts the blood vessels which in turn increases blood pressure and aggregates the blood clotting process,