1. Cardiac arrest & Reactivation

2. Cardiac arrest & Reactivation
Cardiac arrest is the cessation of normal circulation of the blood due to failure of the heart to contract effectively.
A cardiac arrest is different from (but may be caused by) a heart attack, where blood flow to the muscle of the heart is impaired.
Cardiac arrest is a medical emergency that, in certain situations, is potentially reversible if treated early. Unexpected cardiac arrest sometimes leads to death almost immediately; this is called sudden cardiac death (SCD).

3. Cardiac arrest & Reactivation
Causes
Coronary heart disease is the leading cause of sudden cardiac arrest. Many other cardiac and non-cardiac conditions also increase one's risk.

4. Cardiac arrest & Reactivation
Signs and symptoms
Cardiac arrest is an abrupt cessation of pump function in the heart (as evidenced by the absence of a palpable pulse).
Due to inadequate cerebral perfusion, the patient will be unconscious and will have stopped breathing. The main diagnostic criterion to diagnose a cardiac arrest, (as opposed to respiratory arrest which shares many of the same features), is lack of circulation; however, there are a number of ways of determining this. Near death experiences are reported by 10-20% of people who survived cardiac arrest.

5. Cardiac arrest & Reactivation
Treatment
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.

6. Cardiac arrest & Reactivation
CPR involves chest compressions at least 5 cm deep and at a rate of at least 100 per minute 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 or nose or utilizing a device that pushes air into the subject's lungs.
if a shockable rhythm is present, the treatment may followed by Automated External Defibrillator (AED).