By Tim Harms, American Heart Association— INDIANAPOLIS, IN— More than 350,000 out-of-hospital cardiac arrests occur in the United States each year[1]. This February, during American Heart Month, the American Heart Association is calling on everyday citizens to be agents of change by stepping in as the first responder until professional help arrives. Nine out of every 10 people who experience cardiac arrest outside of a hospital die, in part because they do not receive immediate CPR more than half of…