The following are 10 key updates to the 2010 American Heart Association cardiopulmonary resuscitation (CPR) guidelines from this summary of the 2015 CPR guidelines:

1. It may be reasonable for communities to use social media to summon rescuers who are able to perform CPR to a suspected out-of-hospital cardiac arrest (OHCA) victim.
2. Untrained bystanders should perform compression-only CPR on OHCA victims until arrival of trained personnel, and trained bystanders should add rescue breaths in a ratio of 30 compressions to 2 breaths.
3. For adults victims of OHCA without an advanced airway in place, it is reasonable to pause compressions for <10 seconds to deliver 2 breaths.
4. In adults with OHCA, it is reasonable for rescuers to perform chest compressions at 100-120/minute.
5. Chest compressions should be performed in adults to a minimum depth of 2 inches and a maximum of 2.4 inches.
6. When an automatic external defibrillator (AED) is immediately available, it is reasonable to use the AED as soon as possible in adults with witnessed OHCA.
7. Total pre- and post-shock pauses in chest compressions should be as short as possible.
8. When an advanced airway is in place, it may be reasonable for a rescuer to deliver 1 breath every 6 seconds during continuous chest compressions.
9. It may be reasonable to immediately resume chest compressions after shock delivery without a pause for a rhythm check.
10. The routine use of passive ventilation techniques during CPR in adults is not recommended.

Keywords: American Heart Association, Arrhythmias, Cardiac, Cardiopulmonary Resuscitation, Defibrillators, Emergency Medical Services, Heart Arrest, Out-of-Hospital Cardiac Arrest, Social Media

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