For recurrent organized LA tachycardia post-PVI, focal ablation is typically sufficient, and linear lesions are only needed for macroreentrant mechanisms.
Recurrent organized LA tachycardia after PV isolation is uncommon and typically has a focal origin from reconnected PV ostia. Reisolation of the PV and ablation of non-PV foci are sufficient to treat this proarrhythmia. Linear lesions are only required when a macroreentrant mechanism is present.
Gerstenfeld et al. (Wed,) studied this question.