Heart deaths increase significantly during the fuels, where temperatures are increased in both day and night, while some types of heart disease are more sensitive to heat. The above is found by a study, published in the Jacc American Cardiology College.

Researchers analyzed data for nearly 2.4 million heart disease deaths in China over six years. They studied the effects of the fires that occur only day, only night and those who last day and night, but also the intensity, duration and time when the heatwaves occur, in order to have a more accurate assessment of the risk.

As they found, The risk of mortality is steadily increasing with the heat exposure that occurs in both day and night. On the contrary, the impact on heatwaves that last only on the day or only at night appeared after specific boundaries and moderate tensions.

They also found that the risk was not the same in different types of heart disease.

Or cardiac arrest, acute myocardial infarction and heart failure They were particularly sensitive to heatwaves that last day and night, while pulmonary heart disease has an increased risk only in high -intensity heat exposure.

Researchers point out that previous studies that do not take into account different types of heat and their cumulative thermal load may underestimate the risk of heart mortality from heatwave up to 54%.

As they point out, it is important to develop urban heat mitigation strategies to protect vulnerable populations. In addition, given their larger impact, the continuing heatwaves on both day and night should be explicitly taken into account in risk assessment and early warning systems.