ANTONIA REEVE / SCIENCE PHOTO LIBRARY ANTONIA REEVE / SCIENCE PHOTO LIBRARY
Heart bypass surgery. Image 1 of 3. Surgeon removing a vein from a patient's leg for use in coronary artery bypass graft (CABG) surgery to bypass a blockage of a coronary artery. The coronary arteries are the small arteries that supply blood to the heart muscle, and a blockage can be fatal. The harvested vein will be attached to the heart, and will reroute blood around the blockage. The blockage is usually a build up of fatty cholesterol. For a sequence showing the preparation of a harvested vein, see images M560/421-423.
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