Mezue ahịrịokwu na-esonụ: Na ngụkọta, Bratanov bụ onye mmeri Bulgarian ugboro asaa; ugboro ise n'èzí na 400 m ihe mgbochi (1972, 1973, 1974, 1978 na 1979) na ugboro abụọ n'ime ụlọ karịa 400 m (1974 na 1975). Na
1978 European Championships na Prague Bratanov kpochapụrụ na ọkara-ikpeazụ, ma na 1980 Summer Olympics na Moscow ọ ọzọ ruru eru maka Olympic ikpeazụ; ọ bụ naanị onye na-eme egwuregwu na-eme ka 400 m hurdles ikpeazụ na Montreal na Moscow. Ọ tara ahụhụ na njedebe nke Moscow ma tinye ebe ikpeazụ na 56.35.