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Make this medical text accessible to a patient with no medical background.

'A coronary artery bypass graft (CABG) is a surgical procedure used to treat coronary heart disease. It involves creating a graft or new pathway for blood to flow through so that blood can bypass a blocked or narrowed artery.'
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If you have heart disease, your doctor may do a surgery to make a new path for your blood to flow through your heart. They make a shortcut that goes around any blocked areas so your blood can get to your heart easier.