Replacement of the diseased valve is done. This is done biologic tissue valves or mechanical valves. Three types of biologic tissue valves are used.
In this, tissues of the same persons is used to make a valve or a valve itself is used e.g. pulmonary valve of a patient is taken and placed on the diseased aortic valve and the valve structure prepared from the pericardium is placed as pulmonary valve. (Ross procedure)
A valve taken from a dead human after processing is used for replacing the diseased valve of another human being (tissue of one species used for another of the same species).
Valves taken from pig or pericardial tissue of calves after processing (porcupine and bovine valves).