Ray Emery's clutch goaltending, an effective power play and a favorable ruling on a debatable play helped the Ducks strengthen their playoff chances with a 4-2 victory over the Calgary Flames on Wednesday at the Scotiabank Saddledome.

Emery improved to 6-0-0 in seven appearances, stopping 23 shots to help the Ducks win for the seventh time in eight games and ninth in their last 10. His work was crucial because earlier in the day All-Star goalie Jonas Hiller acknowledged he was again experiencing symptoms of vertigo and isn't ready to play again.

"I can't make myself see the puck if I don't feel comfortable," Hiller said after the team's morning skate.

Emery, signed as a free agent on Feb. 7, was steady Wednesday when the Ducks needed him to be. However, he did benefit from a ruling by the NHL's Toronto operations executives, who said that replays of Tim Jackman's second-period deflection could not conclusively prove that the puck had crossed the goal line after it struck Emery's glove and so allowed the on-ice call of no goal to stand.

The Ducks vaulted past Nashville and into sixth in the West while severely damaging the Flames' playoff chances. The Ducks have five games left.

The Ducks got power-play goals from Bobby Ryan and Cam Fowler, and defenseman Lubomir Visnovsky tied a club record with his 16th goal this season, a long blast that deflected past Miikka Kiprusoff at 18:51 of the second period. The record was set in the 1998-99 season by Fredrik Olausson. Corey Perry had two goals Wednesday (including an empty-net goal) and now has a league-leading 46.

The choppy first period ended with the Ducks holding a 2-1 lead, with both goals resulting from power plays. The Ducks had a five-on-three advantage for 48 seconds after Robyn Regehr was sent off on a dubious slashing penalty and they scored their first goal with 10 seconds left in Regehr's penalty.