Mapping System–Assisted Bipolar Radiofrequency Ablation for the Treatment of Ventricular Tachycardia Associated With Ventricular Aneurysm

Figures

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  Figure 1. Conduction Path of Ventricular Tachycardia in the CARTO Mapping System It can be seen that the excitation signal is delayed in the key isthmus (white solid line), the excitation signal is transmitted along the first side of the isthmus (white dotted line), and mid- and late-diastolic potentials are clearly recorded at the isthmus.

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  Figure 2. Bipolar Radiofrequency Ablation of Ventricular Aneurysm (A) CARTO mapping system shows that the ventricular tachycardia reentrant circuit associated with the ventricular aneurysm (VA) is located in the key isthmus in the direction of the red arrow; (B) eight radiofrequency ablation lines were performed on the VA using a bipolar radiofrequency ablation forceps, in which the yellow dotted line refers to the reentrant circuit isthmus after ablation of the bipolar radiofrequency ablation forceps; (C) after incision of the VA, the scar tissue inside the VA wall can be seen. This area is the CARTO mapping reentrant loop, and the white dashed line refers to the path of bipolar radiofrequency ablation forceps in his area; (D) after the bipolar radiofrequency ablation, the VA formation of circumferential contraction and linear closure were performed.