Vokoun also stopped Markus Naslund, Nigel Dawes and Ryan Callahan in the tiebreaker. Rangers goalie Henrik Lundqvist stopped Cory Stillman, Nathan Horton and Stephen Weiss before Zednik scored on Florida's fourth attempt.
Michael Frolik scored in regulation for Florida. The Panthers are 12-3-3 since Jan. 1 and are in a three-way tie for sixth place in the Eastern Conference.
Fredrik Sjostrom scored for New York. The Rangers are 1-4-2 in their last seven.
Vokoun, coming off a 42-save shutout at Carolina on Thursday night, stopped 34 shots in regulation and overtime. Lundqvist made 42 saves for the Rangers.
Florida improved to 3-6 in shootouts, while the Rangers dropped to 9-4.
In addition to overtime, the teams played a scoreless third period. Horton had the best scoring opportunity of the period on a power play. He grabbed a loose puck in the high slot while Lundqvist down, but couldn't lift his wrist shot over the goalie.
Sjostrom opened the scoring with 2:46 left in the first period when he jammed home a rebound in the crease. Frolik it at 2:37 of the second. After Stillman's pass from behind the net was deflected, Frolik spun around and beat Lundqvist through the legs.
Notes: NHL commissioner Gary Bettman attended the game. ... Rangers D Dimitri Kalinin has missed four games because of an upper-body injury. ... The Panthers lead the season series 2-1, with one game lest on Feb. 26 in New York.
