Anabolic androgenic steroids produce dose-dependant increase in left ventricular mass in power athletes, and this effect is potentiated by concomitant use of growth hormone. - Karila,T.A.; Karjalainen,J.E.; Mantysaari,M.J.; Viitasalo,M.T.; Seppala,T.A. (Int J Sports Med, 2003)