KCNJ2 and Cardiodysrhythmic potassium-sensitive periodic paralysis: The role of Kir2.1 in ventricular arrhythmia vulnerability has been highlighted by the recently described Andersen’s syndrome [28], in the guinea pig heart model of ventricular fibrillation [29], in a transgenic mouse model [30] and recently in human KCNJ2 mutation [31].