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Triple bypass heart surgery. Team of surgeons in an operating theatre perform a triple coronary bypass on the heart of a male patient. The patient's chest is seen clamped open; one surgeon wears magnifying lenses on his glasses. Tubes (lower right) lead to a heart-lung machine. Coronary bypass surgery restores the blood supply to the heart muscle in patients with coronary heart disease. Parts of the coronary arteries, blocked by fatty plaques, are bypassed by grafts of veins usually taken from the leg. The improved blood flow to the heart muscle relieves angina and reduces the risk of heart attack.
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