WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY
Heart surgery. Surgeon performing coronary bypass surgery. He is wearing magnifying lenses on his glasses to enhance his view of the procedure. The operation involves grafting blood vessels onto the heart in order to bypass blocked or narrowed coronary arteries. The grafted blood vessels are usually taken from the patient's leg. Blocked coronary arteries can cause angina pectoris (chest pain) and heart attack.
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