Mardanshin won the bronze medal at the Soviet Union championship in 1988.

[1] After the dissolution of the Soviet Union Mardanshin went on to win the Russian Championship for three consecutive years from 1996 to 1998.

[2] He spent ten years racing in the Team Speedway Polish Championship from 1992 to 2002.

[3] In 1996, Mardanshin won a silver medal at the Speedway World Team Cup held on 15 September at the Rhein-Main Arena in Diedenbergen.

[5] He died, on 19 January 2005, at the age of 41, during a routine operation to remove metalwork from his shoulder.