KCNA3 and Andersen-Tawil syndrome: Other channelopathies include hyperkalemic periodic paralysis, which is caused by mutations in sodium channels, leading to paralysis that is triggered by high levels of potassium, and Andersen-Tawil syndrome, which is a rare condition caused by mutations in potassium channels, often associated with periodic paralysis, arrhythmias, and other presentations [10].