Bipolar ablation from the right atrium and basal inferoseptal left ventricle to treat ventricular tachycardia arising from the inferoseptal process

Figures

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  Figure 1. 12-Lead ECG of the clinical VT ECG = electrocardiogram.

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  Figure 2. Isochronal late activation mapping map of left ventricular inferoseptal scar.

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  Figure 3. Ventricular tachycardia 3 with septal diastolic signals.

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  Figure 4. Intracardiac echocardiography orientation of catheters toward the crux of the heart.

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  Figure 5. Far-field atrial signals noted from the left ventricle in the bipolar ablation catheter setup.

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  Figure 6. Bipolar ablation with impedance drop.

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  Figure 7. Concealed entrainment at isthmus site for ventricular tachycardia 5 with concealed fusion, post pacing interval minus tachycardia cycle length < 30 ms, and stim-QRS, electrogram-QRS in the last 30% of the diastolic interval consistent with an isthmus exit.

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  Figure 8. Ventricular tachycardia termination within 3.3 seconds of radiofrequency delivery at the site of concealed entrainment.