The Avalanche trailed 2-1 entering the third but came out strong at the start of the period. They put nine quick shots on goalie Al Montoya before Hejda tied it with 12:47 left on an assist by Stastny.
Stastny netted the winner with 5:28 left to give Colorado its fourth straight victory.
Montoya stopped 33 shots before being pulled for an extra skater with 1:30 left.
That's a really tough thing to play through; when you finally are thrown out there, the game is fast, intense, every single play matters, you've got to find a way to play through that and make smart plays. So it's a huge testament to [Vermette] and some other individuals in our locker room that are putting their own ego, their own wants and needs aside, and are ready for those opportunities when they do come.
— Blackhawks captain Jonathan Toews on teammate Antoine Vermette, who returned from being a healthy scratch in Game 3 to score the double-overtime winner in Game 4