Coronary angiography is a procedure to visualize the coronary arteries. The coronary arteries are the blood vessels that supply blood to the heart muscles. To see the coronary arteries, a special dye or contrast medium is injected through a small tube (catheter) inserted via a large artery in the groin or the wrist. The catheter is then advanced to the heart and positioned at the openings of the coronary arteries before injection is performed.
Angioplasty is a procedure to expand narrow arteries that may follow on from an angiogram. Both procedures are done in hospital under local anaesthetic. Angioplasty is a treatment performed by a doctor which involves inserting a small inflatable balloon into a narrowed artery. Sometimes angioplasty may also involve putting a stent (a short tube of expandable mesh) into a narrowed artery. Angioplasty may not be suitable for everyone.