The primary cause of heart disease
is the build-up of plaque (atherosclerosis) in the arteries of the heart. This build-up
can cause the arteries to narrow. Plaque can also break away from the artery walls and
cause a blockage. In both instances the heart muscle does not receive enough blood flow
and oxygen-thus a heart attack can occur.
This athersclerotic plaque picture show its advancement in an artery.