(CNN) -- It was 5:16 a.m. when the call came in to a 911 dispatcher in Madison, Wisconsin. The story, from Cathy Silver, came out staccato: Cathy's husband, Jim, was gagging, gasping for air. A nurse at the University of Wisconsin Hospital, Cathy could see that her husband, the father of four grown children, was in cardiac arrest. Though trained in CPR, Cathy was flustered. "I can't do the breaths!" she shouted. Nevermind, said the dispatcher. Get over him, press on his the chest, circulate the blood. Help would be there soon. Four minutes later, a Madison police officer arrived...
