Coronary angiography is a method used in the detection of coronary artery disease. It can determine which area of the coronary arteries narrowed and / or occluded due to arteriosclerosis. It determines the vessel stenosis or obstruction and provides proper management of the treatment. Heart catheterization may show defects in the operation of the heart valves and walls due to the fact that your heart chambers will be reached during the procedure. Diagnosis of congenital heart diseases such as heart holes.