The Flames had five penalties, two of which led to Lidstrom's goal, in the first 8:13. The Flames seemed to unravel in the opening period, getting penalized twice for cross-checking in a two-minute span.
Calgary's Dion Phaneuf scored a power-play goal early in the second period on a shot that was deflected and fluttered past Dominik Hasek's glove. The Flames went into the third within a goal because of that key score and Miikka Kiprusoff's 33 saves through two periods.
But they couldn't beat Hasek again.
Six minutes into the final period, Detroit rookie Valtteri Filppula followed up his goal-scoring debut in the playoffs with a goal off a rebound.
Game 3 is Tuesday night at Calgary.
PITTSBURGH - Daniel Alfredsson scored twice during a second dominating Ottawa second period in as many days. The Senators made this lead stand, taking Pittsburgh's stars and its crowd out of the game in Game 3 of their first-round series.
The Senators seized back home-ice advantage - they have as many as two home games remaining in the series - by mostly controlling Pittsburgh's stars and getting two key goals from one of their own in Alfredsson.
Ottawa, rebounding from a 4-3 loss at home barely 24 hours before in which it twice squandered third-period leads, takes a 2-1 lead into Game 4 on Tuesday night. Game 5 follows in Ottawa on Thursday.
The Senators have been in control for all but 1Â½ periods of the series, winning 6-3 in Game 1.
ST. PAUL, Minn. - Andy McDonald scored early, Rob Niedermayer scored late, and Ilya Bryzgalov stopped 19 shots, leading Anaheim over Minnesota.
The Ducks lead the best-of-seven Western Conference quarterfinal 3-0. Game 4 will be played here Tuesday night.
Minnesota went 1-for-5 on the power play and is 1-for-15 in the series. That goal, by Petteri Nummelin, didn't come until 38.2 seconds remained Sunday - the only blemish on another stellar game by Bryzgalov.
Niklas Backstrom made 17 saves for the Wild.