Mike Fisher had a goal and assist in regulation to help coach Bryan Murray earn his 600th NHL win. McAmmond and Comrie are both former Oilers who beat Edmonton back-up Jussi Markkanen in the shootout for the Senators (35-22-3), who won their fifth straight game and third straight home game before a crowd of 19,716 at Scotiabank Place.
Murray, 64, becomes the fifth NHL coach with 600 wins behind Scotty Bowman, Al Arbour, Dick Irvin and Pat Quinn. The Shawville, Que., native earned the milestone in his 1,199th career game after winning his first back on Nov. 14, 1981, as coach of the Washington Capitals. Without a contract for 2007-08, Murray remains the longest serving NHL coach not to win the Stanley Cup.
Martin Gerber stopped 27 shots for his sixth straight win and third in relief of Ray Emery, the Senators No. 1 goalie who served the last of a
three-game suspension after slashing Montreal's Maxim Lapierre on Feb. 10.
Petr Sykora scored twice in a 14-minute span of the third period for Edmonton and rookie defenceman Tom Gilbert potted his first NHL goal with 19.9 left in regulation to force overtime.
Trailing 2-0 to open the third period, Sykora beat Gerber to his blocker side with a long slap-shot on a power-play at 1:34. The Czech winger then
intercepted a clearing attempt from Senators centre Chris Kelly to snap a shot past a stunned Gerber at 15:48 to close to the Senators lead to 3-2.
Gerber, who improved to 11-9-1, held on to win for the first time in four career starts against the Oilers.
Fisher ran his point streak to six straight games after slinking into the high slot and going untouched before snapping a shot over the glove of Edmonton backup Jussi Markkanen.
Markkanen faltered on the play, but was elastic at times finishing with 31 saves after his first start in nine games in relief of Dwayne Roloson.
Heatley opened the scoring with his 33rd goal on the Senators 12th shot at 14:44 of the first period, beating Markkanen with a low shot to the glove
The teams combined for 25 hits and 19 shots after a feverish and physical opening 20 minutes.
Off a feed from Fisher, Alfredsson danced through a bewildered Oilers defence before tucking his 20th goal of the season behind a falling Markkanen at 12:17 of the third period.
Edmonton, which fell to 0-3-1 after the fourth of a season-high seven-game road trip, appeared in Ottawa for its first game since battling the Senators
to a 3-3 tie on Nov. 6, 2003.
Ottawa is in Buffalo to begin a home-and-home series with the Eastern Conference-leading Sabres on Thursday, while the Oilers are in Columbus.
Notes: The Oilers scratched defenceman Matt Greene and forwards Zach Stortini and Petr Nedved.