Linn's wife says he had just gone into cardiac arrest Friday when the pizza deliveryman knocked on the door of their Colorado home to bring their order. Kami Linn says she opened the door to "some burly-looking dude" and immediately asked for help.
The deliveryman, Chris Wuebben, happened to be a paramedic recently returned from Iraq.
Kami Linn says Wuebben performed CPR on her husband and revived him. Other paramedics who later arrived then took over. George Linn remains hospitalized in the intensive care unit.
Kami Linn says her husband has a history of heart problems.