Use of a multi-electrode circular pulse field ablation catheter for selective lesion delivery and ablation of focal atrial tachycardia

Figures

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  Figure 1. Intra-procedural 12-Lead ECG of tachycardia. AT = atrial tachycardia; ECG = electrocardiogram.

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  Figure 2. Local activation time map (on the left) and voltage map (on the right) of the RT. Phrenic nerve capture sites are indicated by yellow dots. Sites of earliest activation and signals of interest are indicated by black tags, magenta tags, and a red pin. EGM of lateral most black tag showing qS unipolar signal with pre-P wave timing of 35 ms. AT = atrial tachycardia; EGM = electrogram; LAT = local activation time; RA = right atrium.

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  Figure 3. Local activation time map (on the left) and voltage map (on the right) of the RA with shadowing of our STSF catheter location and RF ablation lesions marked as red dots. Tachycardia did not terminate following RF application. PFA ablation sites are indicated in purple dots. AT = atrial tachycardia; PFA = pulse field ablation; RA = right atrium; RF = radiofrequency; STSF = SmartTouch SF.

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  Figure 4. Local activation time map (on the left) and voltage map (on the right) of the RA with shadowing of the VARIPULSE catheter location during PFA application with the electrodes in contact with RA wall highlighted and from which PFA was delivered with termination of AT. Phrenic nerve capture sites are indicated by yellow dots. Sites of earliest activation and signals of interest are indicated by black and magenta tags. RF ablation lesions are indicated in red dots. PFA ablation sites are indicated in purple dots. AT = atrial tachycardia; PA = pulse field; PFA = pulse field ablation; RA = right atrium; vRF = radiofrequency.