UNDERSTANDING CORONARY HEART DISEASE (CHD)  According to current estimates, 64.4 million Americans have one or more types  of cardiovascular disease. Within cardiovascular diseases, coronary heart  disease (CHD) is the single largest killer of Americans. CHD caused 502,189  deaths in the US in 2001 – about 1 in every 5. The American Heart Association  estimates that 13.2 million Americans have CHD. In fact, up to half of all  sudden, out-of-hospital cardiac deaths occur in people with no prior diagnosis  of heart disease, and over two-thirds of heart attach sufferers have blockages  in their arteries considered to be clinically “insignificant” in terms of plaque  burden and percent stenosis. Until recently, it was widely held that most heart  attacks were caused by a gradual build-up of atherosclerotic plaque within the  arteries of the heart (“hardening of the arteries”), impedes blood flow, and  eventually results in blocked blood vessels that can cause acute ischemic events  such as...
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