Methods are provided herein for treating cardiac arrhythmias, such as for treating an arrhythmia syndrome, for example Brugada syndrome, in a subject. In some embodiments, the methods include selecting a subject with Brugada syndrome and administering to the subject an effective amount of an agent that increases the expression or activity of SIRT1 in the subject. In some embodiments, the agent increases Nav1.5 activation. In some embodiments, the agent increases the expression or activity of SRIT1 and increases Nav1.5 activation.
