A composition of biochemical substances for the treatment of arrhythmia in a human susceptible to arrhythmia, and its method of administration, comprising at least one ascorbate compound selected from the group consisting of ascorbic acid, pharmaceutically acceptable ascorbate salts and/or mixtures thereof in combination with at least one carnitine compound selected from the group of carnitine hydrochloride, pharmaceutically acceptable carnitine salts and/or mixtures thereof.