Coronary angiography is an invasive imaging procedure, with which a cardiologist can view the coronary arteries with the use of a special contrast and a specific X-ray machine. It allows a narrowing (stenosis) or other pathologies of the coronary arteries to be diagnosed.

This procedure is carried out percutaneously through the radial (in most cases) or the femoral artery. Α special catheter is initially advanced through these arteries in the ascending aorta and then into the ostium of the left or the right coronary artery. The contrast is then injected into the coronary arteries, which allows them to be viewed with the use of the X-ray machine.

A general anesthesia is not needed to perform this procedure; only local anesthesia is applied around the puncture site.

The complication rate during this procedure is very low.