Derek Forbort then put Vancouver ahead 3-2 with 23 seconds left in the period, beating Sorokin above the left pad and under his glove from the left face-off circle on a rush.
Teddy Blueger extended the lead to 4-2 at 1:03 of the third when he snapped a shot past Sorokin’s glove from high in the left circle.
“It’s disappointing, especially those last two goals,” Islanders defenseman Adam Pelech said. “It just wasn’t good enough tonight in kind of a must-win game. We’re just disappointed with our performance.”
Demko stuck out the left pad to deny Anders Lee’s backhand from the top of the crease at 9:29 and later stopped Simon Holmstrom’s shot from the right side of the net at 16:19.
Sherwood scored into an empty net at 18:08 for his second of the game and the 5-2 final.
The Canucks took a 1-0 lead at 2:37 of the second when Sherwood deflected Hughes' point shot from the slot.
“That's just the IQ and beauty of Quinn there,” Sherwood said. “I just get open, and he puts it on my tape. He does that all the time for other guys, and he's one, two steps ahead of everyone else. Like, he draws so much attention to him. So sometimes it's hard to read, because he's insane out there, and he's just unpredictable. Sometimes we don't even know what he's doing.
“But, I mean, he creates so much time and space. He does it all and I’m just happy to be the beneficiary of that.”
Cizikas tied it 1-1 at 5:35 with a short-handed goal, scoring on the rush from in close off a Jean-Gabriel Pageau pass.
Tony DeAngelo gave the Islanders a 2-1 lead at 9:00. After Demko stopped an Pierre Engvall shot, DeAngelo gathered the rebound in the low slot before scoring over a lunging Demko.
“It’s a big win for us,” Canucks coach Rick Tocchet said. “Obviously, Demko was really good for us, especially in the first half of the game. I don’t think we were in love with our first two periods. The third, we played our best period. But sometimes, that’s what you have to do. Even if you feel like you aren’t playing your best game as a team or an individual, you've got to find a period, and I thought our third period was better.”
NOTES: Hughes (assist) has eight points (two goals, six assists) in his past eight games. ... DeAngelo has five points (one goal, four assists) during a four-game point streak. ... The Islanders had a seven-game home point streak end (4-0-3).