Heart health is often assessed through familiar risk factors such as cholesterol, blood pressure, blood sugar, smoking and weight. However, cardiovascular health can also be influenced by environmental conditions that may receive less attention during routine health assessments.
Air pollution is one of the major concerns. Fine particulate matter can penetrate deep into the lungs and has been associated with inflammation, changes in blood-vessel function and increased clotting. Long-term exposure has also been linked with cardiovascular conditions including heart attacks and strokes.
A 2019 study published in the European Heart Journal estimated that air pollution was associated with 8.8 million excess deaths globally each year, with cardiovascular disease accounting for a substantial share of those deaths.
Other environmental exposures may also matter. Living near heavily congested roads or industrial areas can mean prolonged exposure to pollutants, while persistent noise and repeated periods of extreme heat can place additional stress on the cardiovascular system.
This means a person can have apparently controlled cholesterol and blood pressure while still experiencing environmental exposures that may affect cardiovascular health. Unlike individual risk factors such as smoking or diet, people often have limited control over the environmental conditions around their homes and workplaces.
Reducing these risks therefore requires measures beyond individual lifestyle changes. Cleaner transport, stronger controls on industrial emissions, better urban planning and effective air-quality standards can all play a role in reducing population exposure.
The broader approach to heart-health prevention is increasingly about looking beyond numbers recorded during a medical consultation and considering the environments in which people live and work.
