finish for a female trainer. it is remarkable when you consider what she had to overcome to get there. here's dr. sanjay gupta with today's "human factor." >> reporter: kathy's heart was racing during the kentucky derby. well, not her heart, but the one that she received in a transplant two years ago. she made it to her first run of the roses as the trainer for mucho macho man, but it was she, not the horse, that was the long shot in this race. >> it would take forever to get over my colds. any time i got sick, it seemed like i had to go to the doctors. it seemed like my system was always weak. >> reporter: diagnosed with cardio myopathy in 2001, she had to stop training horses for nearly six years as her condition deteriorated. >> tiredness. i was sick to my stomach. everything hurt. my feet hurt. my head hurt. i was miserable. i was miserable to be around. >> reporter: and there was no