#heart_surgery__heartsurgery  any surgical procedure involving the heart
  supertype:  #surgical_operation__operation__surgery__surgical_procedure__surgical_process  a therapeutic procedure with instruments to repair damage or arrest disease in a living body; "they will schedule the operation as soon as an operating room is available"; "he died while undergoing surgery"
  subtype:  #closed-heart_surgery  heart surgery in which a small incision is made (the chest cavity is not opened)
     subtype:  #port-access_coronary_bypass_surgery  heart surgery in which a coronary bypass is performed by the use of small instruments and tiny cameras threaded through small incisions while the heart is stopped and blood is pumped through a heart-lung machine
     subtype:  #minimally_invasive_coronary_bypass_surgery  heart surgery in which a coronary bypass is performed on the beating heart by the use of small instruments and cameras threaded through small incisions
  subtype:  #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
     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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