CARDIOPULMONARY arrest is the absence of functional ventilation and circulation in a person who is not expected to die. This includes patients with life-threatening but reversible aberrations of cardiopulmonary function as may be seen in coronary occlusion, asphyxia (drowning, carbon monoxide, drugAbbreviations UsedAV:artificial ventilationCPR:cardiopulmonary resuscitationECC:external cardiac compressionF1O2:inspired oxygen concentrationUAO:upper-airway obstructionoverdose or fires), anaphylactic reactions (to medications, insects or foods) and electrocution (electricity or lightning).DiagnosisThe absence of functional ventilation is determined by the lack of any abdominal or thoracic movements, and the absence of breath sounds or . . .