The presence of three medications to improve heart function was discovered in Kamila Valieva’s doping test, according to the US Anti-Doping Agency (USADA). These medications, according to The New York Times, can be used in combination to increase endurance. Kamila Valieva’s doping test indicated the presence of trimetazidine, L-carnitine, and hypoxen, according to USADA’s CEO Travis Tygart. Among these three, only trimetazidine is on the list of drugs that are prohibited for athletes. “It’s a trifecta of chemicals, two of which are legal and one of which isn’t.” According to Travis Tygart, the…