More details are emerging about the beloved comedian's untimely death. Shortly after Joan Rivers went into cardiac arrest during a small procedure at a Manhattan clinic, a 911 call was placed at the highest priority level. Within five minutes, a Fire Department company arrived, followed by paramedics from a nearby hospital and emergency medical technicians, who attempted to save Rivers. She had already been hooked up to a defibrillator and fitted with a breathing tube while staffers tried to revive her with CPR. For seven days, Rivers was kept alive on life support, but she died on Thursday.