Your heart is a muscular pump which pumps
oxygen-rich blood around your body. Your heart needs
its own energy supply to do this – the coronary
arteries. There are three main coronary arteries
which
supply the heart with its own supply of oxygen-rich
blood.
A heart attack (myocardial infarction) happens when
the supply of oxygen-rich blood to part of the heart
is restricted, and an area of heart muscle dies. This
usually happens when one of the coronary arteries becomes
narrowed by fatty deposits within its walls or blocked
by a blood clot. When this happens, the part of the
heart it supplies dies. How serious a heart attack is
depends on the amount of heart muscle that is affected.
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Last Updated 06/03/2008 17:20:01
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