The St. Louis Blues made sure an integral piece of their blue-line will remain with the club for the long term.

On Friday, general manager Doug Armstrong announced in a release the team had come to terms with restricted free-agent defenceman Alex Pietrangelo on a new seven-year extension.

The club did not announce official terms of the deal, but reports suggest the overall value is $45.5 million US. He's coming off a three-year entry-level pact.

"We’re excited to have Alex signed over the next seven years as he will continue be a key component of our franchise,"  Armstrong said in a release. "He is an elite defenceman in this league and will be for years to come."

The deal puts an end to what were at times tricky negotiations. Contract talks between the two sides had broken down —Armstrong said they had reached an impasse "for now" — earlier in the week and the rearguard wasn't present when the Blues opened training camp on Wednesday.

Pietrangelo, 23, had five goals and 19 assists last season while playing in all 48 games of the lockout-shortened campaign for St. Louis.

He posted a career-best 12 goals and 51 points in 2011-12 and has surpassed the 40-point plateau twice in his five-year career.

The six-foot-three, 201-pound defender was 13th last season among NHL defencemen in ice time last season, averaging over 25 minutes per game.

Originally chosen in the first round of the 2008 NHL draft (fourth overall), the King City, Ont., native has 29 goals and 92 assists in 224 career regular-season games.

Pietrangelo recently took part in Team Canada's Olympic orientation camp ahead of the 2014 Sochi Winter Games, and has represented Canada on three separate occasions internationally (2009 world juniors, 2010 world juniors, 2011 world championships).