Episodes of intense cold are not limited to winter discomfort: they can also directly influence blood pressure, particularly in people who already have hypertension. Several studies conducted in countries with harsh climates show a measurable increase in blood pressure when temperatures drop, a phenomenon that is far from insignificant from a cardiovascular standpoint.
Epidemiological data reveals that blood pressure levels are higher in cold weather and lower in mild climates. This seasonal variation is accompanied by an increase in cardiac events. According to specialists, a significant proportion of cardiovascular mortality observed in Nordic countries is statistically linked to low temperatures.
A physiological reaction that puts stress on the cardiovascular system
In response to cold, the body activates defense mechanisms to conserve its internal heat. Blood vessels constrict, the heart rate accelerates, and oxygen consumption increases. This vasoconstriction mechanically raises blood pressure and can promote the formation of clots or the destabilization of atherosclerotic plaques, increasing the risk of heart attack or stroke.
Cold weather, an often underestimated risk factor for the heart
Cardiologists also point to an aggravating factor: cold can promote dehydration, thickening the blood and placing additional strain on the heart. While the precise impact of cold remains difficult to isolate from overall statistics, the correlation with clinical observations is clear.
For those affected, caution is advised during periods of extreme cold. It is recommended to avoid unusual physical exertion, dress warmly, and monitor blood pressure more regularly. However, the long-term treatment for hypertension remains the same: whether it's hot or cold, regular medical checkups and taking medication are essential to minimize risks.
