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XB-ART-51890
Card Electrophysiol Clin 2016 Mar 01;81:247-56. doi: 10.1016/j.ccep.2015.10.037.
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Iron Overload Leading to Torsades de Pointes in β-Thalassemia and Long QT Syndrome.

Refaat MM , El Hage L , Steffensen AB , Hotait M , Schmitt N , Scheinman M , Badhwar N .


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The authors present a unique case of torsades de pointes in a β-thalassemia patient with early iron overload in the absence of any structural abnormalities as seen in hemochromatosis. Genetic testing showed a novel KCNQ1 gene mutation 1591C>T [Gln531Ter(X)]. Testing of the gene mutation in Xenopus laevis oocytes showed loss of function of the IKs current. The authors hypothesize that iron overload combined with the KCNQ1 gene mutation leads to prolongation of QTc and torsades de pointes.

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Species referenced: Xenopus laevis
Genes referenced: kcnq1
GO keywords: potassium channel activity [+]

???displayArticle.disOnts??? beta thalassemia [+]