CPR and Defibrillators: What You Need to Know

By Gina Kolata in the NYT

Three doctors wearing light blue scrubs stand in a medical room. The one on the left is applying CPR to a training dummy and the one on the right is holding defibrillator paddles.

Before 1958, there was no such thing as CPR. If someone’s heart stopped because of cardiac arrest, that person fell to the ground, with no pulse, no breathing. And they were simply declared dead.

All of that changed when doctors at Johns Hopkins Hospital in Baltimore discovered cardiopulmonary resuscitation by accident when studying how to shock a heart. When they pressed defibrillator panels to the chest of a lab dog, they saw a blip in blood pressure. They pressed harder and discovered they could push blood through the body. And thus was born CPR.

The problem is that only a tiny fraction of people who have a cardiac arrest and are not at a hospital get CPR. That, said Dr. Benjamin Abella, medical director of the Center for Resuscitation Science at the University of Pennsylvania, is “a national tragedy.” Bystander CPR can be the difference between life and death, as the case of Damar Hamlin demonstrated during a Buffalo Bills-Cincinnati Bengals football game earlier this month.

CPR is not as daunting as it seems; it can be learned in minutes. At the University of Cincinnati Medical Center, where Mr. Hamlin was treated, Dr. Jason McMullan, an emergency medicine physician, has taught CPR to everyone from Cub Scouts to people in nursing homes.

Here is what you need to know about what it is and how to do it.

A cardiac arrest, also known as sudden cardiac death, occurs when the heart suddenly stops beating.

The person collapses to the ground and is unconscious, appears lifeless, has no pulse and is not breathing. There can be many causes.

“You should call 911 but it can take several minutes or more for the ambulance to arrive,” said Dr. Sumeet Chugh, director of the Center for Cardiac Arrest Prevention at Cedars-Sinai in Los Angeles. “In the meantime, with every minute that goes by the chances for a successful revival decrease by ten percent.”

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