L-arginine reduces heart rate and improves hemodynamics in severe congestive heart failure. - Bocchi,E.A.; Vilella de Moraes,A.V.; Esteves-Filho,A.; Bacal,F.; Auler,J.O.; Carmona,M.J.; Bellotti,G.; Ramires,A.F. (Clin Cardiol, 2000)