The Medford airport recently replaced one of its automated external defibrillators, used to re-establish regular heart rhythm, and added a second one, airport officials said in a news release.

The Medford airport recently replaced one of its automated external defibrillators, used to re-establish regular heart rhythm, and added a second one, airport officials said in a news release.

The units were purchased for $2,225 each. One will be put on the public side of the terminal, and one will be placed in the passenger-only area.

The Philips HeartStart units each have a display showing the patient's heart rhythm. They provide automated coaching and instruction for infant, child and adult emergencies. They will be tested on a daily basis.

Airport officials said the Medford airport was the first airport in the state to install an AED back in 1999.