It did not take long for Ventspils to establish a sizable advantage, as the hosts were already up 12-3 four minutes into the first quarter.
Having finished the period with a 12-0 run, the club from the Latvian seaside ran away to a 16-point advantage after the first ten minutes of play.
Barsy had managed to stop the bleeding in the second quarter with a rather even second quarter, but the scoreboard still showed 45-30 in favor of the hosts at the halftime break.
Led by Janis Timma, who was presented with the BBL November MVP award before the game, Ventspils won the third quarter 27-17 and increased the gap to 25 points before the final period to decide the outcome of the game.
Timma finished the game with a team-high 14 points, nine rebounds and four assists, Akselis Vairogs also collected 14 points, while Ronalds Zakis chipped in with 12 points and seven boards.
Lithuanian swingman Gytis Sirutavicius had 15 points for the visitors from Kazakhstan, as Dmitry Gavrilov collected 12 points and grabbed nine rebounds.