Objective To investigate the expressions of SCN5Aand ANK2in sinus nodes of sudden cardiac death(SCD)and their significance in forensic medicine. Methods Twenty-six autopsy heart specimens were collected in this study.Of which,12were SCD,and 14were unnatural deaths of nothing to do with cardiac causes(control group).The expressions of myocardial sodium channel protein(Nav1.5)and ankyrin-B which were encoded by SCN5Aand ANK2in sinus node were detected by immunohistochemical staining. Results The expressions o...