He did not return to Saturday night's game.
Paajarvi played five shifts in the first period of the game Saturday night, but did not return to the ice following the conclusion of his fifth at 10:44.
He was hit by Nashville's Victor Bartley in the defensive zone at 10:02, but stayed on the ice following the hit.
Alexander Steen had two goals to lead the Blues, who had lost three of four.
Information from The Associated Press was used in this report.