Passive Heat Exposure Linked to Increased Heart Stress, Study Reveals
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A controlled laboratory experiment involving both healthy adults and adults with coronary artery disease (CAD) found that passive heat exposure significantly increased myocardial blood flow (MBF) in all participants, regardless of age and health status, thereby placing considerable stress on the heart.
The study was published in the journal Annals of Internal Medicine.
Coronary artery disease is a leading cause of mortality worldwide, characterized by the narrowing or blockage of coronary arteries due to plaque buildup. This condition restricts blood flow to the heart, increasing the risk of heart attacks. CAD affects millions globally, with rising prevalence due to factors like poor diet, lack of exercise, and smoking.
Recent studies have shown that passive heat exposure, such as from hot environments or certain medical treatments, can significantly increase myocardial blood flow (MBF). Heat exposure can cause significant stress on the heart leading to a supply-demand mismatch in vessels exhibiting flow-limiting disease. Repeated exposures, can result in symptomatic or silent ischemia and increase the risk for adverse cardiovascular events.
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