Heart health is influenced by much more than cholesterol and blood pressure.
According to experts from Vanderbilt University Medical Center, everyday environmental conditions such as heat, polluted air and extreme weather are placing increasing pressure on the cardiovascular system.
Their review, published in Circulation: Heart Failure, explains why these environmental risks deserve greater attention from both doctors and the public.
The heart constantly pumps blood throughout the body. When temperatures rise, it has to work even harder because extra blood is sent toward the skin to release heat.
Heavy sweating can reduce body water, making blood thicker and increasing the likelihood of clot formation. This extra strain helps explain why heart attacks and strokes become more common during periods of extreme heat.
Researchers estimate that deaths related to cardiovascular disease increase by roughly 12% to 17% during heat waves. With hotter summers becoming more frequent in many parts of the world, protecting vulnerable people is becoming an important public health challenge.
Air pollution creates another serious problem. Fine particles from vehicle exhaust, industry and wildfire smoke can enter the bloodstream after being inhaled. Scientists estimate that air pollution contributes to more than eight million deaths globally each year, and most of these deaths involve cardiovascular disease rather than lung disease. Even short periods of heavy pollution have been linked to increased rates of heart attack and stroke.
Dr. Lavanya Bellumkonda says people living with heart failure are especially vulnerable because polluted air is associated with poorer outcomes. However, healthy people should not assume they are safe. Research led by Dr. Andrew Chang found early signs of reduced heart muscle function in healthy older adults exposed to relatively small increases in long-term air pollution.
The researchers believe doctors should routinely ask patients about environmental exposures. Questions about outdoor work, nearby highways, commuting habits and exercise locations can help identify hidden risks that might otherwise be missed.
Patients can also reduce their own exposure. Staying hydrated, limiting outdoor activity during very hot afternoons, seeking air-conditioned spaces during heat waves, monitoring local air-quality reports, using home air purifiers and wearing N95 masks during periods of heavy smoke or pollution may all help lower cardiovascular stress.
The researchers also point out that environmental events such as hurricanes, wildfires and extreme cold can affect heart health, making emergency planning increasingly important as severe weather becomes more common.
Overall, this review brings together strong evidence showing that environmental factors are important contributors to cardiovascular disease. While it does not establish direct cause and effect through a single clinical study, it reinforces findings from many previous investigations.
Future research will help refine prevention strategies, but current evidence already supports including environmental risk alongside traditional heart disease risk factors when advising patients.
Recognising these hidden dangers may help prevent heart disease before it develops and improve outcomes for people already living with cardiovascular conditions.
If you care about heart health, please read studies about how eating eggs can help reduce heart disease risk, and Vitamin K2 could help reduce heart disease risk.
For more information about health, please see recent studies that olive oil may help you live longer, and Vitamin C linked to lower risk of heart failure.
Source: Vanderbilt University Medical Center.
