From Sportsnet's Jeff Simmons:

Calgary Flames defenceman Mark Giordano suffered an undisclosed injury in the final seconds of Wednesday’s game when he was knocked down to the ice awkwardly by New Jersey Devils forward Steve Bernier.

Giordano headed right to the dressing room after T.J. Brodie helped seal a 3-1 victory for Calgary with a shorthanded empty-net goal.

It looks...weird...

From NHL.com's Mike G. Morreale's recap:

The Flames received a scare at the end of the game when captain Mark Giordano, who scored his 48th point on an assist, appeared to sustain an injury in the final seconds after getting tangled in the stick of Devils forward Steve Bernier.

Flames coach Bob Hartley said Giordano would be re-evaluated on Thursday. The defenseman was walking and moving in the locker room at the end of the game.