Nearly a decade's worth of data collected across Singapore suggests increased concentrations of tiny particles in the air can trigger cardiac arrests, making the need to cut air pollution levels around the world even more urgent.
Nearly a decade's worth of data collected across Singapore suggests increased concentrations of tiny particles in the air can trigger cardiac arrests, making the need to cutResearchers looked for particles at least 25 times smaller than the width of a human hair known as PMa host of health problems, including autoimmune diseases.
Here, pollution levels in Singapore were tracked against more than 18,000 reported cases of out-of-hospital cardiac arrest between July 2010 and December 2018. Through statistical analysis, 492 of the cases could be attributed to increases in PMsays epidemiologist Joel AikThis is an observational study, meaning we can only speculate over the relationship between the pollution levels and the cardiac arrests.
However, there's enough in the data to indicate it's a link worth exploring further. The data showed that daily PMconcentrations averaged out at 18.44 micrograms per cubic meter. Testing hypothetical reductions in air pollution, the researchers found that a drop of 1 microgram per cubic meter correlated to an 8 percent reduction in heart attack events, while a drop of 3 micrograms per cubic meter saw a 30 percent reduction.
There was also a clear drop in the risk of having a heart attack 3 to 5 days after exposure to higher levels of pollution, suggesting that the effects are short term. The researchers say cleaning up city air could save lives and reduce strain on hospitals. "These results make it clear that efforts to reduce the levels of air pollution particles in the 2.5 micrograms or lower range, and steps to protect against exposure to these particles, could play a part in reducing sudden cardiac arrests in Singapore's population, while also reducing the burden on health services,"
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