A voltage-gated sodium channel subtype that mediates the sodium ion PERMEABILITY of CARDIOMYOCYTES. Defects in the SCN5A gene, which codes for the alpha subunit of this sodium channel, are associated with a variety of CARDIAC DISEASES that result from loss of sodium channel function.

Synonyms: Voltage Gated Sodium Channel Type 5 Subunit alpha, Type 5 Voltage-Gated Sodium Channel, Voltage Gated Sodium Channel Type 5, Sodium Channel Protein Type 5 Subunit alpha, Voltage-Gated Sodium Channel Type 5 Subunit alpha, SCN5A Sodium Channel alpha Subunit, NAV1.5 Voltage Gated Sodium Channel, 0, Voltage-Gated Na+ Channel Na(v)1.5a, Voltage-Gated Sodium Channel Type 5, Sodium Channel, Voltage-Gated, Type V, alpha Subunit, Type 5 Voltage Gated Sodium Channel, NAV1.5 Voltage-Gated Sodium Channel