Deep Blue Scuba

Austin, Texas

ANDI CPR Provider


Cardiopulmonary resuscitation (CPR) is an emergency procedure which is performed in an effort to manually

preserve intact brain function until further measures are taken to restore spontaneous blood circulation and

breathing in a person in cardiac arrest. It is indicated in those who are unresponsive with no breathing

or abnormal breathing, for example agonal respirations. It may be performed both in and outside of a hospital.


CPR involves chest compressions in an effort to create artificial circulation by manually pumping blood

through the heart. In addition, the rescuer may provide breaths by either exhaling into the subject's mouth.

This process of externally providing ventilation is termed artificial respiration. Current recommendations place

emphasis on high-quality chest compressions over artificial respiration; a simplified CPR method involving

chest compressions only is recommended for untrained rescuers.


CPR alone is unlikely to restart the heart; its main purpose is to restore 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 in order to restore a viable or "perfusing" heart rhythm.

Defibrillation is only effective for certain heart rhythms, namely ventricular fibrillation or pulseless

ventricular tachycardia, rather than asystole or pulseless electrical activity. CPR may succeed in inducing a

heart rhythm which may be shockable. CPR is generally continued until the subject regains return

of spontaneous circulation (ROSC) or is declared dead.


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