Working in unison alongside her Central Pulse teammate Karin Burger, with a couple of 'Harrison Hoists' in the mix, Fitzpatrick ensured that the Ferns had plenty of opportunities to score.
Young Ferns shooter Aliyah Dunn proved her worth yet again on the international stage, alongside her experienced counterparts Bailey Mes and Ameliaranne Ekenasio, sinking essential long-range shots from the wider two-point circle zone.
Meanwhile, denying top Jamaican defender Shamera Sterling any opportunity to take a rebound, Mes was back in fine form in the shooting circle after being away from the international fold since the Silver Ferns' Commonwealth Games campaign.
More than 10 points ahead, things looked good for the Kiwi side in the final quarter but a stunning power play six-point shot from Jamaica with less than a minute remaining in the clash suddenly put the pressure back on the Ferns.
With plenty to play for, New Zealand held their nerve to claim victory in style.
Earlier in the evening, defending champions England played for pride with a 35-33 win over South Africa to place fifth, before Australia defeated Malawi 38-15 to claim bronze.