Introduction:
Cardiopulmonary resuscitation (CPR) is required if a collapsed person is unconscious or unresponsive, not breathing, and has no pulse in a large artery such as the carotid or femoral.
The following may also be seen:
occasional, ineffectual (agonal) gasps
pallor or cyanosis
dilated pupils
brief tonic grand mal seizure.
Sudden cardiac arrest still causes over 60% of deaths from coronary heart disease in adults.