The angiographic catheter is a tool used to examine coronary arteries. It is inserted through a small incision in the groin or arm to reach the heart, and then passed through the coronary artery. The catheter is equipped with a tiny balloon on its tip, which is inflated to block blood flow through the artery so that an image of its interior can be captured by X-ray.
Once an image has been obtained, the balloon is deflated and withdrawn from the artery. The procedure is repeated until all desired images have been obtained.