What is the maximum temperature the heart can withstand? - Hot summer days "challenge" the functioning of the vital organ
Extreme temperatures, exacerbated by the climate crisis, pose a serious threat to human health. The human heart and body cannot cope with continuous heat waves, increasing the risk of fatal consequences.
We are in the midst of a climate crisis, and extreme temperatures will continue to worsen in the coming decades. Heat waves are considered the deadliest climate events because our bodies are not designed to withstand extreme temperatures, especially for prolonged periods. The risk of death is, of course, significantly higher for vulnerable individuals such as the elderly, heart patients, children and others, but even a young, healthy person can lose their life to heat.
There is still no definitive answer to the maximum temperature the human body can tolerate, but professors at the University of Roehampton in the UK are conducting experiments to understand what the vital threshold is. In particular, they are focusing on the basal metabolic rate, a measure of the energy the body uses to keep functioning. According to them, in hot and humid conditions this metabolic rate increases significantly and the maximum critical temperature for the human body is somewhere between 40° C and 50° C.
The study showed that the resting metabolic rate increased by 35 percent with exposure to a temperature of 40℃ and a relative humidity of 25%, while it increased to 48 percent with a temperature of 50℃ and 50 percent relative humidity. Heart rate (64 percent), minute ventilation (78 percent), and sweating (74 percent) also increased significantly under the most extreme conditions of the experiment, which involved thirteen young, healthy subjects.
Extreme heat causes blood vessels to dilate and blood pressure to drop, forcing the heart to work harder to maintain the balance of vital parameters. It is clear that this condition can lead to stroke or heart attack, especially in predisposed subjects, but in extreme environmental conditions, pressure stroke can also affect a perfectly healthy person.
According to a study by the prestigious scientific journal The Lancet, it was determined that in the last 20 years, heat-related deaths have increased by 68 percent.
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