ECG 1. The initial rhythm is atrial fibrillation. The fifth beat is a ventricular premature beat. A ventricular tachycardia (VT) emerges. As evident, ventricular tachycardia may appear more polymorphic in one lead (the upper lead).ECG 2. Although the signal in the upper lead appears very disorganized, there are visible QRS complexes. The signal in the lower lead shows that the rhythm is a polymorphic ventricular tachycardia (or even flutter).ECG 3. Continued polymorphic ventricular tachycardia / flutter.ECG 4. Continued polymorphic ventricular tachycardia / flutter.
