CPR saves roughly 32,000 to 36,000 lives per year in the United States, based on the most recent survival data. That estimate comes from applying the 10.2% survival-to-discharge rate for EMS-treated out-of-hospital cardiac arrests to the more than 350,000 cases that occur annually. The number is both impressive and sobering: it means about 9 in 10 people who suffer cardiac arrest outside a hospital do not survive.
Where the Numbers Come From
More than 356,000 out-of-hospital cardiac arrests happen in the U.S. each year, according to the American Heart Association. Of those, about 40% receive bystander CPR before paramedics arrive. The 2025 AHA statistics update reports that 10.2% of adults treated by emergency medical services for non-traumatic cardiac arrest survive to hospital discharge. When the arrest is witnessed by a bystander, that figure climbs to 15.4%, and when a 911 responder witnesses it, survival reaches 18.2%.
Inside hospitals, the picture is quite different. Roughly 24% of patients who arrest in a hospital setting survive, thanks to immediate access to trained staff, defibrillators, and medications. The gap between in-hospital and out-of-hospital survival highlights how much timing and access to help matter.
Bystander CPR Changes the Odds
People who receive CPR from a bystander before EMS arrives have a 28% greater chance of surviving compared to those who receive no bystander CPR, according to research supported by the National Institutes of Health. That boost in survival is entirely dependent on someone nearby knowing what to do and choosing to act.
Every minute of delay matters. Compared to people who receive CPR within the first minute of collapse, those who wait two to three minutes are 9% less likely to survive. At four to five minutes, the odds of survival drop by 27%. The brain begins to suffer irreversible damage within minutes without blood flow, so the gap between a bystander starting compressions and paramedics arriving (typically 7 to 10 minutes in urban areas) is often the difference between life and death.
Adding a Defibrillator Dramatically Improves Survival
CPR alone keeps blood moving to the brain and heart, but many cardiac arrests involve an abnormal heart rhythm that needs an electrical shock to reset. When a bystander uses an automated external defibrillator (AED) alongside CPR, survival rates jump to a median of 40%, and in some studies as high as 53% when an untrained bystander simply follows the device’s voice prompts. Compare that to the sub-10% survival rate when patients rely on EMS alone.
AEDs are increasingly available in airports, gyms, schools, and office buildings. They’re designed for anyone to use, with step-by-step audio instructions and built-in safeguards that prevent a shock unless the heart rhythm warrants it.
Survival Varies by Age
Age is one of the strongest predictors of whether someone survives cardiac arrest. Working-age adults (18 to 65) have a 30-day survival rate of about 13%, while people aged 66 to 80 survive at roughly 6%, and those over 80 survive at about 2%. The encouraging trend is that survival has improved across all age groups over the past two decades. Among working-age adults, 30-day survival nearly quadrupled from 5.8% to 22% between 2001 and 2011 as bystander CPR training became more widespread and emergency systems improved.
Income and Location Create Gaps
Where you live and how much you earn affect your chances of surviving cardiac arrest. People in higher-income households are significantly more likely to survive. Women in the highest income bracket are roughly 2.5 times more likely to survive than women in the lowest bracket. For men, the difference is about 1.6 times. Higher-income neighborhoods tend to have more bystander witnesses, higher rates of bystander CPR, more public-location arrests (where help is nearby), and shorter emergency response times.
The type of heart rhythm at the time of arrest, specifically whether it’s “shockable” or not, turned out to be the single most important factor linking income to survival. People in higher-income areas are more likely to present with a shockable rhythm, possibly due to differences in underlying heart conditions and overall health.
How the U.S. Compares Globally
A large meta-analysis pooling data from multiple countries found that the global average survival-to-discharge rate for out-of-hospital cardiac arrest is about 8.8%. North America falls slightly below the global average at 7.7%, while Europe reaches 11.7% and Australia/New Zealand (Oceania) leads at 16.2%. Asia has the lowest rate at 4.5%.
Long-term survival tells a similar story. One-year survival after out-of-hospital cardiac arrest averages 7.7% globally, with Oceania again at the top (11.5%) and North America at the bottom among Western regions (4.0%). Countries with higher rates of bystander CPR training, denser AED networks, and faster emergency response systems consistently perform better. The variation proves that cardiac arrest survival is not fixed by biology alone. It is shaped by public health infrastructure and community preparedness.
Why the Real Number Could Be Higher
The roughly 32,000 to 36,000 annual survivors represent only those who leave the hospital alive after out-of-hospital cardiac arrest. This figure does not include the much larger number of in-hospital cardiac arrests, where survival rates are about 24%. It also doesn’t capture the many people who receive CPR for drowning, choking, drug overdoses, or other emergencies that stop breathing or circulation but aren’t classified as cardiac arrest in national registries.
If bystander CPR rates rose from the current 40% to 60% or higher, as some Scandinavian countries have achieved through mandatory school-based training, tens of thousands of additional lives could be saved each year in the U.S. alone. The gap between current performance and what’s achievable remains large.