400 m, Women
| Competition | 1978 South American Athletics U20 Championships |
|---|---|
| Venue |
Sao Paulo
 BRA
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | María Labarca |  CHI |
55.9 | ||
| 🥈 | Cecilia Romero | CHI |
56.6 | ||
| 🥉 | Maria José Ferreira dos Santos | BRA |
57.7 |