Heiskanen's goal came unassisted on the power play, his shot deflecting off Nashville defenseman Mattias Ekholm's knee to tie the game 1-1 at 12:37 of the second period. He initially was credited with a second goal when his shot off a pass from defenseman John Klingberg gave the Stars a 2-1 lead 6:10 into the third period, but a scoring change Thursday gave the goal to Alexander Radulov, with Heiskanen getting the primary assist.
Goalie Ben Bishop, who made 30 saves for the win, said Heiskanen looked like he was playing in his 100th NHL playoff game, not his first.
"He plays like he's been in the League for 10 years," Bishop said. "Since the first game of the season, he's gotten better, but he's been that good all year. He's a big part of this team, and he does a lot of good things for us, night in and night out. He's not a rah-rah guy. He just puts his head down and his boots on and goes to work. That's what the playoffs are about: Some guys who aren't recognized in the regular season get a little bit more press, and he's definitely deserving of it."