| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS |
|---|---|---|---|---|---|---|
| 1 | 1 | 2 | JAM | Jamaica |
JAM |
42.29 Q CR |
| 1 | 1 | 1 | USA | United States |
USA |
42.29 Q CR |
| 2 | 2 | 1 | TTO | Trinidad and Tobago |
TTO |
42.59 Q SB |
| 3 | 2 | 2 | NGR | Nigeria |
NGR |
42.77 Q SB |
| 4 | 3 | 1 | GER | Germany |
GER |
42.92 q SB |
| 5 | 1 | 3 | GBR | Great Britain & NI |
GBR |
43.20 Q |
| 6 | 3 | 2 | BRA | Brazil |
BRA |
43.22 q SB |
| 7 | 2 | 3 | FRA | France |
FRA |
43.35 Q SB |
| 8 | 4 | 1 | SUI | Switzerland |
SUI |
43.41 SB |
| 9 | 3 | 3 | BAH | Bahamas |
BAH |
43.54 SB |
| 10 | 4 | 2 | CAN | Canada |
CAN |
43.69 SB |
| 11 | 4 | 3 | PUR | Puerto Rico |
PUR |
44.04 SB |
| 12 | 5 | 3 | POL | Poland |
POL |
44.07 SB |
| 13 | 5 | 2 | CHN | PR of China |
CHN |
44.12 SB |
| 14 | 5 | 1 | DOM | Dominican Republic |
DOM |
44.30 SB |
| 15 | 6 | 2 | IVB | British Virgin Islands |
IVB |
44.53 SB |
| 16 | 7 | 2 | VEN | Venezuela |
VEN |
44.64 SB |
| 17 | 6 | 3 | JPN | Japan |
JPN |
44.66 |
| 18 | 6 | 1 | AUS | Australia |
AUS |
44.69 |