BSIP, LECA / SCIENCE PHOTO LIBRARY BSIP, LECA / SCIENCE PHOTO LIBRARY
Heart surgery. Surgeons performing an operation on a patient's heart. They are wearing gloves and face masks to maintain a sterile environment. Heart surgery is often performed to treat a blocked coronary artery, one of the arteries that supplies the heart muscle with blood. A blockage can lead to a heart attack, which can be fatal.
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