Single lead electrocardiogram (ECG) showing torsades de pointes
Single lead electrocardiogram (ECG) showing torsades de pointes
The electrocardiographic rhythm strip shows torsades de pointes, a polymorphic ventricular tachycardia associated with QT prolongation. There is a short, preinitiating RR interval due to a ventricular couplet, which is followed by a long, initiating cycle resulting from the compensatory pause after the couplet.