The Tri-State Oversight Committee said Monday that it plans to look into a case where a defibrillator on Metro did not work as a man suffered a heart attack on a train.

Metro said a defibrillator device at Pentagon Station didn’t have a sufficient battery charge when it was used on a 51-year-old man who died after having a heart attack on a train April 16.

There are defibrillators at 46 Metro stations now, and Metro said last week that it reviewed them to make sure they were working properly. The agency said it has plans to put defibrillators at all station kiosks and to replace older ones with state-of-the-art devices by the end of the month.

Metro said it is also making changes to improve how it inspects defibrillators.

Station managers will have to sign an inspection sheet at the beginning of their shifts to acknowledge that they have checked status lights on the new machines that show the devices are charged and “functioning properly,” said Dan Stessel, Metro’s chief spokesman.

The Tri-State Oversight Committee said in a news release that it is going to review the “proposed inspection procedures and independently evaluate their adequacy.”

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