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Patient has paroxysmal Afib. Provider does PVI 93657 confirms isolation in each vein. Then documents -- Extensive left atrial substrate modification was then performed. The posterior wall region between the PVs was debulked by targeting prominent EGMs rendering the region to be scarred as verified by scar mapping. Roof and Floor lines were created by virtue of the posterior wall ablation. Burst pacing was performed from the CS but did not induce SVT. Would this documentation support coding 93657 since the patient has a history of Paroxysmal AFIB BUT it was not induced after the PVI?