Andersen made 30 saves for his first post-season shutout as the Ducks blanked the Flames 3-0 on Sunday to take Game 2 of their second-round series.
Ramo, making his first-career playoff start, turned away 31-of-33 shots in place of Jonas Hiller, who was pulled early in the second period of Game 1. And while Ducks fans serenaded him with chants of "We Want Hiller" in the final minutes, Ramo gave the Flames more than a chance to come out of Anaheim with home-ice advantage.
"He made some key saves for us," Flames centre Sean Monahan said about his goaltender. "It could have been a totally different game, but that's what the playoffs are all about, for different guys to step up. Rams did that for us and helped us stay in it early."
Anaheim now leads the best-of-seven matchup 2-0. The series shifts to Calgary for Game 3 on Tuesday.
Matt Beleskey, Hampus Lindholm and Nate Thompson scored for the Ducks.
The fact that the Flames were even in the game after a barrage of Anaheim scoring opportunities in the first period was a testament to Ramo's play. The Finnish netminder had to make 19 saves in the opening 20 minutes — including a sprawling save to deny Ryan Getzlaf and a glove stop off Kyle Palmieri's shot in the opening five minutes.
Beleskey finally broke through at 7:27 of the first on an odd-man rush started by Jakob Silfverberg. Ryan Kesler raced ahead and set up Beleskey to beat Ramo over his left glove hand.
Flames coach Bob Hartley made several lineup changes before the puck dropped, and the tinkering continued during the game. Sam Bennett replaced Johnny Gaudreau on the top line with Monahan and Jiri Hudler. Mason Raymond also got a chance to play alongside Monahan and Hudler.
Those moves allowed the Flames to finally establish some offensive continuity during the final 40 minutes, but did not lead to an equalizer.
A Ducks turnover gave Raymond the puck at point-blank range, but Andersen swallowed up his poor shot. Joe Colborne also had a good look off Francois Beauchemin's poor attempt at a clearance and Andersen responded with the glove save.
After finally establishing an effective forecheck to start the third period, Calgary's hopes were extinguished when Lindholm scored with 8:45 remaining.
Thompson added an empty-net goal.
Corey Perry had two assists and now leads the league with 13 points this post-season.
Ducks coach Bruce Boudreau admitted he was worried that the game remained in doubt as long as it did.
"Tonight was nip and tuck the whole game," said Boudreau. "We were good in the first period, but once you have that many shots and only have a 1-0 lead, I was a little afraid. I don't think by any stretch of the imagination this was a dominant effort by us."
The Flames have now lost 21 consecutive games at Honda Center dating back to the 2006 Western Conference quarter-finals. To get a chance to return to Orange County and break that dubious mark, the focus is on the things they did well instead of the final score.
"We started playing with our strength," said Ramo. "We sped it up, put the puck deep and kept it away from their goalie so we got some zone time. We started battling, we started playing smart hockey and got some chances. It's just not enough right now, but it's not the end of the world right now. We are going home and we have two big home games."
Notes — Micheal Ferland, who did not return after exiting Game 1 in the first period, was scratched after going through warmups. The Flames also scratched C Lance Bouma, C Drew Shore, D Corey Potter, C Paul Byron, D Raphael Diaz, D John Ramage, and C Markus Granlund. David Wolf made his post-season debut. ... Ducks G John Gibson (flu) did not dress for the second straight game.