Fig. 9. Congenital long QT syndrome. (A) Electrocardiogram of a newborn with a history of fetal bradycardia showing polymorphic ventricular tachycardia with undulating and sinusoidal appearance of the axis of the QRS complex. This indicates torsade de pointes. (B) The underlying rhythm is QT prolongation with 2:1 atrioventricular block (arrows).
