A valve replacement surgery is usually done to replace or repair a diseased valve in the heart. There are four main valves in the heart which function to ensure unidirectional flow of the blood between the different chambers. Even the blood that flows out of the heart to ensure proper circulation in the body passes through a valve. These valves open and close enough of ensure blood flow and stop the blood from flowing in the opposite direction. However with time and lack of care which is very evident among Indians the valves ceases to function and loses its capabilities.