| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Antonio Pettigrew |
USA
|
44.52 Q | |
| 2 | Roberto Hernández |
CUB
|
44.66 Q | |
| 3 | Danny Everett |
USA
|
44.97 Q | |
| 4 | Ian Morris |
TTO
|
45.00 Q | |
| 5 | Seymour Fagan |
JAM
|
45.34 | |
| 6 | Ibrahim Ismail Muftah |
QAT
|
45.46 | |
| 7 | Derek Redmond |
GBR
|
45.67 | |
| 8 | Benyounés Lahlou |
MAR
|
45.75 |
| POS | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|
| 1 | Roger Black |
GBR
|
44.64 Q | |
| 2 | Andrew Valmon |
USA
|
45.08 Q | |
| 3 | Susumu Takano |
JPN
|
45.43 Q | |
| 4 | Mark Garner |
AUS
|
45.53 Q | |
| 5 | Patrick O'Connor |
JAM
|
45.54 | |
| 6 | Samson Kitur |
KEN
|
46.07 | |
| 7 | Alvin Daniel |
TTO
|
46.23 | |
| 8 | Olivier Noirot |
FRA
|
47.13 |