The final of the Women's 400 metres Hurdles event at the 2003 Pan American Games took place on Wednesday August 6, 2003, with the heats staged a day earlier. America's Joanna Hayes was the only woman to go under the 55-seconds barrier, clocking 54.77 in the final. Medalists Records Results See also 2003 World Championships in Athletics – Women's 400 metres hurdles Athletics at the 2004 Summer Olympics – Women's 400 metre hurdles Notes References Results Hurdles, Women's 400 2003 2003 in women's athletics