One-point posterior ablation for complete isolation of the posterior left atrium

Figures

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  Figure 1. Voltage map of the left atrium (LA) before and after the ablation. A: The voltage map before the ablation did not reveal any low voltage zones at the LA posterior wall. It also revealed that there was no reconduction of the pulmonary veins. B: Ablation was stopped at 10 seconds at the location marked by the green tag because of high esophageal temperatures. After ablation to the location marked by the blue tag, the LA posterior wall did not have a potential, and the LA voltage map showed complete LA posterior isolation. An intracardiac electrogram acquired by a PentaRay catheter (Biosense Webster, Diamond Bar, CA) at the same location revealed that the potential of the LA posterior wall disappeared compared to before ablation. CS = coronary sinus; PA view = posterior anterior view; PENTA= PentaRay catheter.

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  Figure 2. Pacing from the left posterior wall after posterior ablation. Pacing from the left posterior wall following high-dose isoproterenol provocation was performed because the post-voltage map suggested posterior wall isolation. Posterior wall capture with exit block was confirmed using PentaRay catheter (Biosense Webster, Diamond Bar, CA). ABL = ablation catheter; CS = coronary sinus; PR = PentaRay catheter.