Useful numbers, with the context that keeps them honest.
Cardiac arrest data is often repeated without a source, a date, or an explanation of what was measured. This page keeps those details attached to the number.
The figures focus on out-of-hospital cardiac arrest in the United States, because that is where CPR training, bystander action, and AED access can make an immediate difference before emergency responders arrive.
Six CPR and cardiac arrest statistics to know.
Use the links beside each figure to read the original source before quoting it.
263,711
estimated EMS-treated, nontraumatic out-of-hospital cardiac arrests in the U.S. in 2024
This is the estimated national number of cases treated by emergency medical services, across all ages.
Statistics show the need. Practice helps people act.
Cardiac arrest outcomes depend on many details, including whether an event is witnessed, where it happens, the rhythm involved, access to an AED, and the time it takes for emergency responders to arrive. A single statistic cannot predict what will happen in one emergency.
What the data does make clear is that the people nearby matter. CPR and AED training give individuals and teams a chance to practice recognizing an emergency, calling 911, and starting the response they have been taught.
This page uses primary public-health and professional guidance sources. The national 2024 outcome figures come from the Cardiac Arrest Registry to Enhance Survival, known as CARES, as reported in the American Heart Association’s 2025 resuscitation guidelines. The broader annual estimate comes from the CDC. This page was last reviewed on November 3, 2026.