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Global cardiovascular disease risks and prevention

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2026-10-04 17:22 UTC → 2026-10-06 12:26 UTC · added ~~removed~~

Global medical research is increasingly focusing on the evolving risks and prevention of cardiovascular diseases. In South Africa, cardiovascular conditions have emerged as the leading cause of death for adults over 40, partly due to increased longevity following improved HIV treatments. Recent studies have identified specific environmental and physiological risk factors. Research involving the UK Biobank indicates that exposure to artificial light during sleep—specifically levels exceeding three lux—is linked to ‘cardiac remodeling,’ such as the thickening of left ventricular walls. This exposure is associated with increased risks of stroke, heart failure, and myocardial infarction due to disruptions in the body’s circadian rhythm. Newer data involving approximately 89,000 adults in the UK Biobank over an eight-year period suggests that individuals with the highest levels of nighttime light exposure face a 21% to 34% higher risk of all-cause mortality compared to those in darker environments. Experts, including Dr. Andrew Phillips of Flinders University, note that disrupting circadian rhythms through light exposure is closely linked to the development of obesity, diabetes, metabolic syndrome, hypertension, myocardial infarction, and stroke. The brain uses light as a primary signal to synchronize the body’s internal clock, and intense light during rest periods can delay essential physiological processes. Additionally, evidence suggests that atherosclerosis can begin as early as a person’s 20s. Medical experts emphasize the importance of early intervention through lifestyle management, such as diet and physical activity, and caution that certain demographics, including women, may overlook subtle symptoms like fatigue or jaw pain.

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