Congenital long QT syndrome can lead to
Correct Answer: Polymorphic ventricular tachycardia
Description: Polymorphic VT has a continually changing QRS morphology indi- cating a changing ventricular activation sequence. Polymorphic VT that occurs in the context of congenital or acquired prolongation of the QT interval often has a waxing and waning QRS amplitude creat- ing a "twisting about the points" appearance referred to as Torsade de Pointes Ref Harrison 20th edition pg 1445
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