The invaluable help of the new procedures for cardiology research has allowed us to better study the various cardiac abnormalities . These plays an important role intracardiac catheterization, which allows us to determine data such as blood gases and pressure curves ; the cineangiocardiografía can detect small abnormalities that escape even the intracardiac catheterization and the boom that has nowadays cardiac surgery using cardiopulmonary bypass. Thus we have , reviewing studies in past decades especially in regard to congenital heart disease and pulmonary stenosis including concepts and found Pure percentages have varied. Since Morgagni in 1791 , he described the first case of pulmonary valve stenosis , to Abbot ( 9 cases) , Brock and Campbell ( 18 cases) Abrahams and Wood ( 26 cases ) Kirklin et al. ( 100 cases ) and others, we come to 1961 when Sherf exhaustive study takes the form...