In the case of a cardiac arrest, not everyone is fortunate enough to have a trained medical team on the sidelines.

When Damar Hamlin of the Buffalo Bills went into cardiac arrest during an NFL Monday Night Football game two weeks ago, there were many skilled people with all kinds of equipment ready to offer life-saving help. They were able to get to work immediately and Hamlin appears well on the road to recovery.

It’s not always that easy to find help, but a free app may be able to help.

PulsePoint AED — a branch of the popular emergency services app PulsePoint — can point people to the nearest automated external defibrillator.

“We do have that resource in Warren County,” Warren County Public Safety Director Ken McCorrison said.

The app also allows users to upload a photo of a public AED with some location information to help grow the database. In Warren County, that photo goes to the Department of Public Safety and McCorrison encourages users of the app to upload new locations.

If it’s a duplicate of an existing location or of a pending location, no harm. If approved, the AED location is added to a DPS registry.

“The bigger businesses have registered theirs with us,” McCorrison said. “All the schools. Churches. Then, when somebody calls 911 for an emergency that requires an AED, that system sends out a ping.”

The operator can tell the caller where the nearest, publicly available AED is.

PulsePoint AED can do the same. “If you open up that app, it’ll show you a map,” McCorrison said. “You’ll see a mustard-colored symbol that says AED” at every public, reported and saved location. Other AEDs — those that may be behind a locked door at certain times or are otherwise not publicly available — show up in a gray color.

A 911 operator will not send a caller to an AED that is not publicly available, McCorrison said.

PulsePoint AED isn’t perfect. It’s possible that an AED might not be the right equipment for the medical condition, and there might not be one close enough to help.

AEDs guide users through the process. If the patient is not in an appropriate state for AED use, the equipment will not work.