In each series, home ice advantage was awarded to the team that had the better regular season record.
In the series finale, the Canadiens got the only goal when Mats Naslund scored with just 51 seconds remaining in regulation.
This was a rematch of last year's Adams Division Semifinals, in which Quebec won in a three-game sweep.
In the final game, Buffalo led 5–3 with just nine minutes remaining but allowed the Nordiques to score two goals in a span of 64 seconds to tie it at 12:06.
New York won both previous series over the past two seasons, including last year's Patrick Division Finals in five games.
Their most recent meeting was in the 1970 Stanley Cup Quarterfinals, which the Black Hawks won in a four-game sweep.
Los Angeles won their only previous meeting in a stunning upset 3–2 in the 1982 Smythe Division Semifinals.
The franchise did not get to the conference finals again until 1996, their first year as the Colorado Avalanche, in which they won the Stanley Cup.
The Philadelphia Flyers ended the New York Islanders' string of five straight seasons in the Stanley Cup Finals by dispatching the club four games to one.
The Chicago Black Hawks simply outscored the Minnesota North Stars in an offensive-minded six-game series that featured 62 total goals.
Edmonton won the previous two meetings over the past two seasons, including last year's Smythe Division Semifinals in a three-game sweep.
Defending Cup champion Edmonton was too much for the Winnipeg Jets, sweeping them in four straight games and doubling their goal total.
Flyers captain Dave Poulin's five-on-three shorthanded goal early in the second period sealed the win and returned Philadelphia to the Stanley Cup Finals for the first time since 1980.
The win came at a high cost for the Flyers as both 54-goal forward Tim Kerr and defenceman Brad McCrimmon were lost for the remainder of the playoffs with injuries.
Edmonton won the only previous meeting in a four-game sweep in the 1983 Clarence Campbell Conference Final.
Oilers' Jari Kurri scored three hat tricks in the series, setting a still-standing NHL record.