Health
Scientists link 1 in 100 deaths from heart disease to extreme weather
A new study shows that exposure to extreme heat or cold increases the risk of death in heart patients.
Synthesizing 40 years of global data on cardiac patients, the authors found that such extreme conditions collectively contributed to approximately 11.3 additional cardiovascular deaths for every 1,000 such events. I discovered that
Patients with heart failure are more likely than those with other types of heart disease to face adverse effects from very cold or hot weather, the authors observed. their discovery It was published Monday in the American Heart Association’s journal Circulation.
The study found that these individuals had a 12% higher risk of dying on an extremely hot day and a 37% higher risk of dying on an extremely cold day compared to the optimal temperature day for a given city. I was.
A clear link between temperature extremes and patient outcomes “underlines the urgent need to develop measures to help our society mitigate the effects of climate change on cardiovascular disease.” said study co-author Haitham Kleischer, a fellow at the University of Maryland School of Medicine. , mentioned in statement.
To draw conclusions, Khraishah and his colleagues conducted a global analysis of over 32 million cardiovascular deaths over 40 years. In this study, from 1979 to 2019, he looked at death tolls in 567 cities in 27 countries on five continents.
The exact measure of extreme weather varies from city to city, but researchers defined it as the 1% above or below temperature where the lowest mortality rate is achieved.
The researchers found that for every 1,000 cardiovascular deaths, extremely hot days (above 86 degrees Fahrenheit in Baltimore, where the authors are based) caused 2.2 additional deaths.
Meanwhile, extreme cold days (below 20 degrees Fahrenheit in Baltimore) were found to be responsible for 9.1 deaths.
According to this study, heart failure patients experienced 2.6 deaths on extremely hot days and 12.8 deaths on extremely cold days.
Researchers don’t know why extreme temperatures had a greater impact on heart failure patients, but Khraishah speculated that this “may be due to the progression of heart failure as a disease.” I’m here.
“One in four people with heart failure will be readmitted within 30 days of being discharged from the hospital, and only 20% of heart failure patients survive 10 years after diagnosis,” he said.
Khraishah and his colleagues acknowledged some limitations of their study, including underrepresentation of data from South Asia, the Middle East and Africa.
According to the authors, more information from these regions could reveal that extreme heat had an even greater impact than first measured.
“The decline in cardiovascular mortality since the 1960s is a major public health success story,” said Barrak Alahmad, a research fellow at the Harvard TH Chan School of Public Health. statement.
Arahmad, who is also a faculty member at the Kuwait University School of Public Health, said the success story is due to cardiologists’ efforts to address individual risk factors such as tobacco use, physical inactivity, type 2 diabetes and high blood pressure.
“The challenge now is the environment and what climate change will bring us,” said Alahmad.
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