Emergencies involving kids are scary, but knowing basic first aid for CPR and choking can make a huge difference.

The science of resuscitation has advanced since CPR and ECC guidelines were last published ... heart can create blood flow after the shock. Basic life support is now emphasized over pulse checks ...

The guidelines also say an AED can be used, if one is available, after the person has been removed from the water. But CPR should be started before using an AED. "Drowning can be fatal," Dezfulian ...