Inactivation and reactivation of sodium influx in the heart muscle.
D000818:Animals; D001001:Anura; D006321:Heart / Q000502:physiology*; D006325:Heart Atria; D066298:In Vitro Techniques; D008564:Membrane Potentials; D009206:Myocardium; D012964:Sodium / Q000378:metabolism*
D012964:Sodium