Andersen syndrome, Andersen-Tawil syndrome
An autosomal dominant channelopathy in which abnormal potassium release by cardiac or somatic cells results in a triad of symptoms, including life-threatening ventricular irritability. Affected patients are prone to periodic paralysis, prolonged QT syndrome with cardiac dysrhythmias, and subtle facial findings, e.g., broad forehead with narrow maxilla or chin.
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