Dispatcher cardiopulmonary resuscitation instruction via telephone.
D004631:Emergency Medical Service Communication Systems; D004632:Emergency Medical Services; D006323:Heart Arrest / Q000401:mortality / Q000628:therapy; D006801:Humans; D011379:Prognosis; D012151:Resuscitation / Q000193:education*; D013689:Telephone; D013997:Time Factors