<prompt> Which of the following inherited disorders is a Potassium Channelopathy?Hyperkalemic periodic paralysisHypokalemic periodic paralysisBeckerss diseaseAnderson Tawil syndrome  <response>: d. Anderson Tawil syndromeRef: Harrisons 19e p 462Channelopathies are progressive syndromic cluster of symptoms not localizing to single lesionImportant Channelopathies: All of these are autosomal dominant show episodic weaknessFeatureCalcium ChannelSodium ChannelPotassium ChannelHypokalemic PPHypokalemic PPParamyotonia CongenitaAndersen-Tawil syndromeAge of onsetAdolescenceEarly childhoodEarly childhoodEarly childhoodMyotoniaNoYesYesNoFrequency of attacks of weaknessDaily to yearlyMay be 2-3dayWith cold, usually rareDaily to yearly 