Angiography is an x-ray technique performed in the cardiac catheterization laboratory by an interventional cardiologist. After a catheter is inserted through a leg artery and threaded through the body up into the heart, dye is injected into the heart chambers and the coronary arteries around the heart. The movement of the dye through the heart can then be visualized on a special monitor. This technique is used to measure the blood flow and blood pressure in the heart chambers to determine if the coronary arteries are blocked.

How It Works

Doctors perform a cardiac catheterization procedure, in which a long, thin catheter is inserted into a leg artery and threaded up to the heart. After the catheter reaches the heart, dye is injected through the catheter into the heart. The dye allows doctors to visualize how the heart chambers and coronary arteries are working. The movement of the dye is recorded as an angiogram (a digital movie) and viewed on a television monitor.

Texas Heart Institute