Martin Tristani-Firouzi, Judy L. Jensen, Matthew R. Donaldson, Valeria Sansone, Giovanni Meola, Angelika Hahn, Said Bendahhou, Hubert Kwiecinski, Anna Fidzianska, Nikki Plaster, Ying-Hui Fu, Louis J. Ptacek, Rabi Tawil
Representative ECGs from AS subjects. (a) ECG demonstrating prolongation of the QT interval. (b) ECG traces demonstrating a short run of nonsustained polymorphic VT followed by bigeminy (normal QRS complex alternating with a premature ventricular complex). Ventricular arrhythmias dominated the rhythm of this subject throughout the day. (c) Bidirectional VT (note alternating QRS axis polarity) degenerating into a brief run of polymorphic VT. (d) ECG trace demonstrating prominent U wave (indicated by arrows).