Matt D'Agostini scored with just over a minute left in overtime to lift the Blues to a 3-2 win over the Hurricanes.  Jason Arnott and David Backes each scored in the second period for St. Louis, which overcame a 2-0 deficit to snap its two-game losing streak.  Brian Elliott stopped 27 shots in the victory.  Jay Harrison and Brandon Sutter had the goals for Carolina, which had won its previous three games.  Cam Ward allowed all three goals on 43 shots in the setback.