Higher exposure to airpollutantscan cause narrowing of blood vessels in those already having an underlying heart condition, thus exposing them to serious Health risks, including aheart attack, according to astudypublished in the Journal of the American College of Cardiology (JACC).
The study says prolonged exposure to PM2.5 or fine particulate matter can lead to a sudden, temporary squeezing of the arteries which can lead to heart attack.
The findings are based on an analysis of test reports of 287 patients suffering from Non-Obstructive Coronary Artery Disease or NOCAD (defined as less than 50% diameter stenosis) who underwent coronary angiography followed by a coronary provocation test at a hospital in Rome in which a drug is injected to check whether the coronary arteries are hyper-responsive.