Term Name:	sodium:proton antiporter activity involved in regulation of cardiac muscle cell membrane potential
Synonyms:	sodium:hydrogen antiporter activity involved in regulation of cardiac muscle cell membrane potential
Definition:	Enables the transfer of a solute or solutes from one side of a cardiac muscle cell membrane to the other according to the reaction: Na+(out) + H+(in) = Na+(in) + H+(out). This transfer contributes to the regulation of the cardiac muscle cell plasma membrane potential.
Ontology:	GO: Molecular Function [GO:0086040]    QuickGO    AmiGO