Air Pollution Linked to Heart Damage, Study Finds

A new study has found that long-term exposure to air pollution, including from smog and wildfire smoke, can damage the heart. The research, published in the medical journal Radiology, used an advanced imaging technique called cardiac MRI on 694 participants in Ontario to study the effects of fine particulate matter on heart health. The study found that even when levels of fine particulate matter were below global air quality guidelines, heart damage was observed, and there is no safe exposure limit for air pollution.

Key Takeaways:

Long-term exposure to air pollution, particularly fine particulate matter, was linked to higher levels of diffuse myocardial fibrosis, a type of heart scarring that can lead to higher risk of heart failure.
The study used an advanced imaging technique called cardiac MRI on 694 participants in Ontario who were exposed to fine particulate matter over one year.
Heart damage was observed even when levels were below global air quality guidelines, such as in Toronto, and there is no safe exposure limit for air pollution.
Fine particulate matter, or PM2.5, are fine particles that are inhaled by the lungs and can cause respiratory problems, especially among people with pre-existing conditions such as asthma.
Long-term exposure to air pollution was associated with increased risk of cardiovascular diseases, including heart failure and stroke, and an estimated 31 per cent of cardiovascular disease is attributable to environmental factors such as air pollution.
Sustained exposure to air pollution, such as what was seen in the summer of 2023, could pose serious health risks, and is more likely to occur in individuals living in large city centres like Toronto, where emissions from cars and factories are higher.

Statistics:

694 participants were included in the study.
31 per cent of cardiovascular disease is attributable to environmental factors such as air pollution, according to the World Health Organization.