Although the first balloon dilation of aortic stenotičnog valve in the fetus was performed successfully as early as 1989th , the fetal cardiac intervention procedures are still in experimental medicine and performed in a few centers in the world. Interventional cardiology procedures at this time in the application of the fetuses with aortic stenosis, fetuses with stenosis / atresia of the pulmonary artery and hypoplasia of fetuses with left ventricle and restrictive međupretkomorskim hole.