Objective To observe the expressions of voltage-gated sodium channel(NaCh)αsubunits in adult rat ventricular myocytes.Methods Single ventricular myocytes were isolated from adult rat heart.Expressions of variousαsubunits(Nav1.1,Nav1.2,Nav1.3,Nav1.5,Nav1.6 and Nav1.7)of NaCh in the ventricular myocytes were detected by immunocytochemistry staining.Sodium current was recorded by whole-cell patch clamp method.Results The neuronal subunits Nav1.1,Nav1.6 and Nav1.7 as well as the cardiac subunit Nav1.5 of NaCh w...