Man living without heartbeat

(WFLX) - An Alaska man was able to leave the hospital -- walking and breathing without a heartbeat.

Christopher Marshall is grateful to be alive thanks to a totally artificial heart.

The device lets him walk without being tethered to a large machine. It is all stored inside a backpack he can carry with him. The only sign is the noise. "Right now, I'm using earplugs at night, and now that I'm going to go home, my wife is going to have to get used to it. Hopefully, we'll get adapted to it."

Chris and his wife are now waiting until a donor heart comes through. There's no time limit on how long he can stay on the artificial heart, but doctors prefer to do the transplant as soon as possible because there's always the danger of infection or other medical complications.

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