It is also worth to note that some of these channelopathies can affect different organs; for instance, LQT7 syndrome caused by KCNJ2 mutations corresponds to Andersen-Tawil syndrome, which is characterized by a triad of ventricular arrhythmias, periodic paralysis, and dysmorphic features (see above). This evidence concerns the gene KCNJ2 and Cardiodysrhythmic potassium-sensitive periodic paralysis.