AEDs Save Lives—Here’s What You Need to Know This American Heart Month

February is American Heart Month, a time to focus on heart health, and one of the most important tools in preventing sudden cardiac death is something you’ve likely seen without thinking twice about it: the AED.

Short for automated external defibrillator, an AED is a portable, easy-to-use device designed to treat sudden cardiac arrest. These bright-colored boxes are mounted on walls in airports, schools, gyms, office buildings, and more. But they’re not just for medical professionals—AEDs are made so that anyone, even without formal training, can use one to help save a life.

A Race Against Time

Each year, more than 350,000 people in the U.S. experience sudden cardiac arrest, according to the American Red Cross. Unlike a heart attack, cardiac arrest strikes suddenly and causes the heart to stop beating effectively. The only way to restart a normal rhythm is with defibrillation, a controlled electric shock to the heart. And every minute without it reduces a person’s chance of survival by about 10 percent.

That’s why AEDs matter so much. While waiting for paramedics, quick action with an AED can dramatically increase survival rates. These devices are designed to guide everyday people through the process with clear voice and screen instructions.

How AEDs Work

According to AED manufacturer Avive, AEDs come with sticky electrode pads that are placed on a person’s chest. Once attached, the device reads the heart’s rhythm. If it detects a dangerous rhythm that can be corrected, it delivers a shock. The internal computer analyzes the data to decide whether a shock is needed, so users don’t have to guess. In fact, the device won’t deliver a shock unless it’s medically necessary.

While it’s helpful to take a CPR/AED training course, it’s not required. The technology is designed so you can follow the step-by-step instructions in the moment, even under stress.

Who Can Have an AED?

All 50 states require AEDs in certain public places, like schools, government buildings, and gyms, but not every space is covered. Churches, private clubs, small businesses, and residential communities often don’t have them unless someone takes the initiative to install one.

Fortunately, AEDs are widely available for purchase. They range in price from about $1,000 to $3,000, depending on features and accessories. People with health savings accounts (HSAs) can usually use pre-tax dollars to buy them, and businesses can often claim the cost as a tax-deductible expense.

For community groups, churches, and schools, grants from nonprofits and government programs can help cover costs. If you’re looking to buy one, make sure to factor in ongoing maintenance, like replacing batteries and electrode pads over time. Support services and warranties can vary by seller, so it’s smart to compare options.

A Small Box with a Big Impact

AEDs don’t just belong in hospitals. They belong wherever people gather. Whether you’re a teacher, coach, employee, or just someone who wants to be ready, knowing how these devices work and where to find them can make the difference between life and death.

This February, take a minute to spot the AEDs in the places you frequent. Ask if your workplace or church has one. And if you’re thinking about how to support your community’s heart health, helping install an AED might be one of the most powerful things you can do.