Karapet was also a member of Armenia national team, participated in 20 international matches and scored 2 goals since his debut on 5 October 1996, in away match against Northern Ireland.
[citation needed] The fans of his former clubs FC Zvezda Irkutsk and FC Krylia Sovetov Samara had raised funds to finance his heart surgery.
Mikaelyan underwent heart surgery on 14 March 2013.
The Union of Football Players and Coaches of Russia was raising money for Mikayelyan's surgery since 25 February.
FC Krylia Sovetov and the Football Federation of Armenia were among those that had provided financial support to Karapet Mikaelyan.