Coronary catheterization is a minimally invasive procedure to access the coronary circulation using a catheter. The procedure uses a special dye that helps visualize the blood flow through the heart.
The procedure begins with access to the artery through the groin.
A needle is inserted through the skin into the artery. The needle is withdrawn until a flash of blood appears. he sheath is introduced with the accompanying dilator. The dilator is removed. The sheath is left behind in the blood vessel holding the tract open and protecting the vessel from trauma.