Do You Know CPR?

Only about 46 percent of those who suffered cardiac arrests outside of a hospital in 2017 received bystander CPR, according to the AHA.

Often, people don’t start CPR because they worry about hurting someone or doing it wrong. But the latest research shows that it is very difficult to cause harm through CPR, even if the person doesn’t need it. “The only real way to do it wrong is to not try to do it,” Abella says.

If you want to brush up so that you can feel confident in the event of an emergency, here are five big changes you need to know about.

Don’t wait. Previously, the AHA recommended “looking, listening and feeling” for breathing or pulse before starting CPR. But that was wasting too much time, Bobrow says. A victim’s chance of survival falls 7 to 10 percent for every minute you delay. So the current guidelines advise calling 911 and starting compressions immediately on someone who is unresponsive and not breathing normally. “If it turns out they are not in cardiac arrest — say they’re drunk or they fainted — they will probably just push your hand away. No harm, no foul,” Bobrow says. 

Send someone to look for an AED. If you’re in a public place, direct any onlookers to search for an automated external defibrillator while you start compressions. These days, AEDs are widely available in airports, health clubs, shopping centers, apartment buildings, workplaces and more, and science shows they significantly boost survival rates.

“Even if you’ve never seen an AED, as soon as you take it out of its case, it will talk to you and walk you through how to apply it to a patient and save a life,” Abella says. Using one is as simple as placing pads on someone’s chest, then standing clear before you press the “analyze” and then “shock” buttons to let the device test someone’s heartbeat, and deliver a shock if needed.

No more mouth-to-mouth. This is by far the biggest change in recent years. The AHA began recommending hands-only CPR for untrained bystanders after several studies showed that cardiac patients did as well or better when they got hands-only CPR compared with the traditional version with breaths. “Every time you stop compressions to deliver breaths, you have no blood flow, and those pauses in blood flow are a problem,” Abella says.

The AHA still recommends CPR with breaths for infants and children, victims of drowning or drug overdose, or people who are having a severe asthma attack. But Abella notes that the vast majority of older Americans who collapse are having an immediate electrical problem with their heart, not a respiratory problem. And what they need most are compressions to circulate blood flow to the brain.

Push harder. Until recently, the AHA recommended pushing 1½ to 2 inches into the chest. The new recommended depth for adults is at least 2 inches. For most people, that means pushing downward as hard as you can. “It would be highly unlikely to push too hard,” Abella says. “To be effective, you need to use a little bit more elbow grease.” Because CPR is tiring, if there are others around, switch off every two to three minutes.

Push faster. In the early days, rescuers were taught to do compressions at a slower rate of 60 beats per minute. But we now know that compressions need to be at a much faster clip to be effective: 100 to 120 beats per minute. 

How to perform basic hands-only CPR:

1. Call 911 or have someone else do it. (If you make the call, put the phone on speaker while you start compressions.)
2. Place both of your hands, one on top of the other, in the middle of the person’s chest.
3. Press down hard and then relax to let the chest rebound.
4. Repeat the press-and-relax motion to the beat of the Bee Gees’ classic disco song “Stayin’ Alive.” (You should do at least 100 compressions a minute.)
5. Don’t stop until help arrives.

Editor’s Note: This story, originally published Dec. 28, 2018, has been updated with new information.