#open-heart_surgery  heart surgery in which the rib cage is spread open and surgery to fix a heart valve or repair a coronary artery is performed while the heart is stopped and blood is detoured through a heart-lung machine
  supertype:  #heart_surgery__heartsurgery  any surgical procedure involving the heart
  subtype:  #coronary_bypass_surgery__coronary_bypass__coronary_artery_bypass_graft__CABG  open-heart surgery in which the rib cage is opened and a section of a blood vessel is grafted from the aorta to the coronary artery to bypass the blocked section of the coronary artery and improve the blood supply to the heart

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