Coronary artery disease occurs when plaque builds up in the coronary
arteries and slows or blocks blood flow to the heart muscle.
Angioplasty is a procedure in which your doctor expands a tiny balloon
that presses the plaque blockage against the artery so that blood may flow more
freely through the vessel.
A stent is inserted into an artery after angioplasty
to help ensure that blood continues to flow freely through the vessel
and to reduce the chance that plaque will block the artery again.