Ku sii qor faqradan - Karapetyan wuxuu ku guuleystay billad qalin ah 1995 World Weightlifting Championships
wadankiisa Armenia. Wuxuu ka qayb galay Olombikada Xagaaga ee 1996 isagoo matalaya Armenia, isagoo galay kaalinta 13-aad, iyo Olombikada Xagaaga ee 2000 oo matalaya Australia, isagoo galay kaalinta 10-aad. Sanadkii 2007 Karapetyan waxaa laga joojiyay laba sano kadib markii uu qirtay isticmaalka benzylpiperazine doping.