breaths for a complete stranger? turns out you may not have to. elizabeth cohen here to explain what we're talking about. >> cold and mushy. >> i remember this. >> remember the whole thing? >> in elementary school. >> 30 pushes and two breaths. >> you to look to see if the chest was in. >> i think it was a little too much algebra for some people until they decided to see would it work just as well if we gave people who were having heart problems just the pushes. these studies in the new england journal of medicine this week found it works just as well. people didn't really need to do the breathing. it worked to do the chest compressions. let me give you the basics. when you do the chest compressions, you're looking to put your hands between the nipples and work really fast and push really hard and if you go to cnn.com/health.com.