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Cardiopulmonary resuscitation (CPR) is an emergency procedure consisting of chest compressions often combined with artificial ventilation, or Mouth to mouth in an effort to manually preserve intact Brain function until further measures are taken to restore spontaneous BloodCirculation and Breathing in a person who is in cardiac arrest. It is recommended for those who are unresponsive with no breathing or abnormal Breathing, for example, agonal respirations. CPR involves chest compressions for adults between 5 cm (2.0 in) and 6 cm (2.4 in) deep and at a rate of at least 100 to 120 per minute. The rescuer may also provide artificial ventilation by either Exhaling air into the subject's mouth or Nose (mouth-to-mouth resuscitation) or using a device that pushes air into the subject's Lungs (mechanical ventilation). Current recommendations place emphasis on early and high- quality chest compressions over artificial ventilation; a simplified CPR method involving only chest compressions is recommended for untrained rescuers. CPR alone is unlikely to restart the heart. Its main purpose is to restore the partial flow of oxygenated blood to the Brain and Heart. The objective is to delay Tissue Death and to extend the brief window of opportunity for a successful resuscitation without permanent Brain damage. Administration of an electric shock to the subject's Heart, termed Defibrillation, is usually needed to restore a viable, or 'perfusing', heart rhythm. In general, CPR is continued until the person has a return of spontaneous circulation (ROSC) or is declared Dead.[from Wikipedia]
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