More than 350,000 people in the United States suffer from sudden cardiac arrest each year, but only some people know CPR. There are plenty of classes available for adults, kids and teens. Getty Images

Q: This year our family vacation is a camping road trip. There will be a lot of hiking and outdoor exploring, so my wife and I have put together a good first-aid kit. Now I think that learning CPR is a good idea. How do you take classes? Can our teenage kids learn, too?

A: Cardiopulmonary resuscitation (CPR) is an emergency life-saving procedure used when someone's heart has stopped beating. It involves a manual technique designed to keep blood flowing through the body until a regular heartbeat can be restored.

The most common cause of sudden cardiac arrest is heart disease. Other situa

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