Feature of Torsade de pointes is
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 1443
Wide QRS complex
Sho QRS complex
Prolonged QT interval
Sho QT interval
C.V.S