Barbashev gave the Golden Knights a 1-0 lead 27 seconds into the first period when his lead pass attempt for Bowman on the rush went in off the skate of Chicago defenseman Wyatt Kaiser.
Oliver Moore tied it 1-1 at 1:23, roofing a wrist shot from the right circle.
“He’s so fast,” Blackhawks forward Frank Nazar said. “It’s fun to play with him. I had a few chances today. I should have found him. He’s sneaky. He gets behind the guys. … He did a good job today, played a good game, and had a nice goal.”
Bertuzzi put the Blackhawks ahead 2-1 at 11:22 of the second period. Hart attempted to clear the puck out of his zone, but Bertuzzi knocked it down and then chipped it in over Hart, who had come out of the crease on the clear attempt.
Ben Hutton tied the game 2-2 at 17:19 after his shot from the high slot bounced off Chicago defenseman Matt Grzelcyk at the right of the crease.
Bedard roofed a snap shot to put Chicago up 3-2 at 4:45 of the third period. He skated across the slot and around Theodore on a 1-on-1 before going back to the far side over Hart's shoulder.
Hart saved six shots in overtime and stopped three in the shootout.
“I settled in a little bit and just got back to playing my game,” Hart said. “The guys did a really good job of battling around the netfront, tying up sticks, and got some huge blocks in the game. It’s a big two points.”