A Seattle doctor says her patient 'came back from the dead' after his heart stopped for 45 minutes and he froze to death.<br />45-year-old hiker Michael Knapinski was found unconscious after being lost in whiteout conditions on Mount Rainier in Washington state.<br />Knapinski was put on life support after arriving at Harborview Medical Center in Seattle, Washington, last week.<br />But his team of doctors quickly decided he would be the perfect patient for the life support machine known as ECMO--essentially a 'heart' outside the body.<br />According to CNN, doctors were able to jumpstart his heart.<br />I'm extremely grateful to everybody here at the hospital for not giving up on me. I'm alive and breathing. Michael Knapinski
