The word Angioplasty is composed of Angio meaning blood vessel and plasty meaning reconstruction. When cholesterol or fat accumulates in the artery, or the blood flow is blocked, the blood flow is normalized by widening it by mechanical means is called angioplasty. This is called percutaneous coronary intervention (PCI). Cholesterol accumulates in the coronary arteries for a long time and forms plaque. The plaque thickens to form an atheroma called a coronary artery. Coronary arteries account for 70%-80%. Dr. Andres Groenzig of Switzerland first applied this method in 1977.