High power short duration (HPSD) ablation may improve pulmonary vein isolation (PVI)
durability and shorten radiofrequency ablation (RFA) time. Measurement of local impedance
(LI) drop on ablation using the DIRECTSENSE software module, an advanced feature of
RHYTHMIA mapping system has shown to assess acute lesion durability but has not been
clinically studied with HPSD.
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