WINFIELD, W.Va. (WCHS) — Paramedics run hundreds of calls every year, but for Calley Yingst, one of those calls about a young boy in elementary school experiencing cardiac arrest stuck with her.

"He actually was a survivor of sudden cardiac arrest in his school gym," Yingst said. "He was seven years old at the time, I believe, and they used an AED. Gryffin was lucky because that school had one. The gym teacher actually knew CPR and was able to start CPR immediately and get an AED on Gryffin."

CPR, along with the use of an automated external defibrillator, more commonly known as an AED, were crucial in saving Gryffin's life. Yingst said having AED's nearby can be crucial in the event of a medical emergency.

"Getting to see Gryffin grow from that point, we've been very thankful to that," Yingst said. "I'm very lucky that his mother has wanted us to keep in contact with him. Every year we see Gryffin, and we see him out and about in our community. That's such a great testament to what bystander care can really do for people.

"911 is always there in an emergency. The emergency doesn't start when I get there. It starts when you get there."

It's now been years since Gryffin's medical emergency, and earlier this week, Putnam County EMS became the first county in the state to implement the PulsePoint App, showing users where the nearest AED is to them in the case of an emergency.

"I was one of the paramedics on Gryffin's case, and it really spoke to me about the real importance of AEDs," Yingst said. "They are not nearly as wide available as you think. Before this app, there was no way to know where they were unless somebody told us.

"Schools we knew were there, but the parks, we had no idea. People's homes and people had them in their cars just for the fun of it. We had no idea they even existed."

Right now, the app registers 89 AEDs across Putnam County. Yingst said an AED has roughly around a three-minute window when it can be used effectively, making knowing exactly where they are very important.

"The purpose of the app is to allow us to build our registry for the community," she said. "So it shows us every AED in the county, whether they're private, public, doctor's offices, schools. The best part about the program actually is that our 911 telecommunicators can use them during a call.

"So if you call in a cardiac arrest, you actually won't require you to really use any thinking. Our telecommunicators can walk you to that AED rather than having you search for it on the phone."

The app also makes the process easier, showing exactly where the AED is located and how to use it.

"So just an overview of our app," Yingst said. "It's going to be in our exact location. This is the AED you see here on the wall behind us. When you click on it, it's going to have a picture of it to kind of give you a little bit more of a familiar area with it so you're not quite so searching."