Resolution of ventricular tachycardia following cavotricuspid isthmus ablation for atrial flutter: Potential implications of cross-chamber induction on catheter ablation strategies

Figures

• 

  Figure 1. Samples of nonsustained ventricular tachycardia. A: Wearable cardioverter-defibrillator recording from the side-to-side (SS) channel. B: Twelve-lead electrocardiogram rhythm strip.

• 

  Figure 2. Catheter ablation of the cavotricuspid isthmus. A: Atrial flutter terminated during ablation and transitioned to an atrial- and ventricular-paced rhythm. Recording speed 50 mm/second. B: Right atrial activation map in the left anterior oblique (LAO) projection accounted for 100% of the 253 ms cycle length. C: LAO caudal projection highlighting the cavotricuspid isthmus with points for His bundle recordings (yellow), ablation lesions (red), and the ablation lesion at site of termination (green).

• 

  Figure 3. A: The immediate postablation 12-lead electrocardiogram demonstrated sinus rhythm at 83 beats/min with a corrected QT interval of 432 ms. B: One-month postablation pacemaker data demonstrated a continuous period of recorded AT/AF (atrial tachycardia or atrial fibrillation) that started 1 day prior to his initial presentation with syncope and ended on the day of catheter ablation.