Athletics Pan American Games 2007 at Rio de Janeiro (bra) Women: 400 m July 25: Final: 1. Ana Guevara (mex) 50.34 2. Christine Amertil (bah) 50.99 3. Indira Terrero (cub) 51.09 4. Shereefa Lloyd (jam) 51.19 5. Davita Prendergast (jam) 51.90 6. Monique Henderson (usa) 52.28 7. Laverne Jones (vir) 52.97 8. Debbie Dunn (usa) 52.97