Miami's habit of making a slow start was particularly acute - they trailed 17-4 in the first quarter and were 37-22 behind midway through the second.
The Heat came out strong in the third quarter though and took the lead for the first time on the night with a LeBron James dunk putting them 52-51 up with 7:36 left in the quarter.
The game turned decisively in Miami's direction when Wade made a superb steal and set up a three-pointer from Ray Allen and put the Heat eight points ahead.
Allen (16 points) had three other three-pointers in the final quarter for the Heat while James (26 points) and Dwyane Wade (23 points).
Game Four of the best of seven series will take place in Miami on Monday.
- Sports & Recreation