heart surgery?

when i had a heart surgery, doctor put me in hypothermia before procedures, why did they do that? is there advantages?

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One Response to “heart surgery?”
  1. Laurence W says:

    It reduces both bleeding and oxygen demand. Better survival rate if there are complications.

    I was cold and awake during my last angioplasty and stent insertion. I wore long thick basketball socks so not all of me was cold.