| 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 |