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Cardiopulmonary resuscitation (CPR) is a combination of rescue breathing and chest compressions for someone suffering a heart attack or sudden cardiac arrest. In 2010 the American Heart Association released new CPR guidelines focusing on chest compressions. The change was made because more and more research shows that the more quickly a cardiac arrest victim receives chest compressions, the more likely he or she is to survive. And with simpler guidelines, some experts think that bystanders will be more confident about what to do and, in turn, will be more likely to help.

Click here to learn hands only CPR techniques.

People suffering sudden cardiac arrest need CPR and a shock to the heart using a defibrillator. Automated external defibrillators are common today in airports, schools, athletic stadiums and other places where large crowds of people gather.