SIMON FRASER / SCIENCE PHOTO LIBRARY SIMON FRASER / SCIENCE PHOTO LIBRARY
Angioplasty. Coloured angiogram taken during a percutaneous transluminal coronary angioplasty (PTCA) to the right coronary artery. It is done to treat a severe stenosis (narrowing, upper centre left) caused by plaques of atheroma lining the inside of the artery; the blood flow is also impaired by a clot seen in the same area just below the stenosis. A special double lumen catheter (top centre inside the artery) is used with a cylindrical-shaped balloon surrounding a portion of it. The inflation of the balloon with a pressure up to 620,000 Pascal dilates the narrowed vessel. The large dark area at top centre is one of the heart's major blood vessels.
Model release not required. Property release not required.