The Pan American Games, second only to the Olympics as the biggest international sports competition in the world, are held every four years (during the year prior to the Summer Olympics) under the sponsorship of the International Olympic Committee. The first Pan American games were scheduled to take place in Buenos Aires in 1942, but the outbreak of World War II forced the games to be postponed. The first Pan American Games were held on February 25, 1951, with more than 2,500 athletes from 22 countries participating. This book lists the results of the Pan American Games from their commencement to the most recent games in 1999. The results are listed by sport (alphabetically), and each listing includes a chronology of the sport in the context of the Pan American Games; a list of the gold, silver, and bronze winners for each year; and charts that show how many medals each country won for that sport in each set of games. Also included are lists of the medals by country, medals by sport, sports by years contested, countries of the Pan American Sports Organization (PASO), presidents of PASO, and a chronology of the Pan American Games. Los Juegos Panamericanos, los segundos mas importantes del mundo tras los Olimpicos, se han venido celebrando cada cuatro anos desde 1951. Se incluye en el presente trabajo bilingue un recuento de los resultados reflejados en dichos juegos a lo largo de su historia, desde los comienzos hasta los mas recientes, celebrados en 1999. Igualmente se presta atencion individualizada a cada uno de los deportes que han ocupado un lugar en el seno de dicho evento, presentandose diversas estadisticas que detallan las medallas obtenidas por cada pais, ademas de informacion sobre la Organizacion de Deportes Panamericanos (ODPA), y una cronologia general de los juegos.