| POS | Rank | Heat | ATHLETE | COUNTRY | RESULTS |
|---|---|---|---|---|---|
| 1 | 1 | 1 | Jermaine Gonzales |
JAM |
44.69 |
| 2 | 2 | 1 | LaShawn Merritt |
USA |
44.74 |
| 3 | 3 | 1 | Chris Brown |
BAH |
44.79 |
| 4 | 4 | 1 | Angelo Taylor |
USA |
44.82 |
| 5 | 5 | 1 | Rondell Bartholomew |
GRN |
45.32 |
| 6 | 6 | 1 | Jonathan BORLÉE |
BEL |
45.45 |
| 7 | 1 | 2 | Rabah YOUSIF |
SUD |
45.60 |
| 8 | 2 | 2 | Miles Smith |
USA |
45.68 |
| 9 | 3 | 2 | Jamaal Torrance |
USA |
45.82 |
| 10 | 4 | 2 | Tabarie Henry |
ISV |
45.90 |
| 11 | 7 | 1 | Renny QUOW |
TTO |
45.99 |
| 12 | 8 | 1 | Johan Wissman |
SWE |
46.16 |
| 13 | 5 | 2 | Tristan Thomas |
AUS |
46.64 |
| 14 | 6 | 2 | Axel Bergrahm |
SWE |
47.78 |
| 15 | 7 | 2 | Fredrik Johansson |
SWE |
49.07 |