[1] She claimed three medals (two silvers and one bronze) in the women's 55 and 59-kg classes at the European Championships and also finished seventh in the 57-kg division at the 2004 Summer Olympics, representing her nation Russia.

[2] Mkrtchyan also trained as a full-fledged member of the taekwondo team for CSKA Moscow under her personal coach and master Boris Zenkin.

[3] Mkrtchyan qualified for the Russian squad in the women's featherweight class (57 kg) at the 2004 Summer Olympics in Athens, by placing second behind Spain's Sonia Reyes and granting a berth from the European Olympic Qualifying Tournament in Baku, Azerbaijan.

[2][4][5] She crashed out in an opening round defeat to U.S. taekwondo fighter Nia Abdallah with a score of 9–16, but slipped into the repechage bracket for her chance of an Olympic bronze medal, following Abdallah's progress towards the final match.

[3][6] In the repechage, Mkrtchyan subsided her Olympic medal chance by losing the first playoff 2–5 to her Italian opponent and two-time Olympian Cristiana Corsi, relegating the Russian to seventh position.