5. CONCLUSION
MI ablation is a process that, if performed diligently, achieves a high rate of acute success. In a small percentage of patients, probably due to the anatomical complexity of MI, incomplete ablation lines could permit the occurrence of PMF circuits despite the verisimilar proof of MI block. These tachycardias are reentrant circuits characterized by a large deceleration of CV in the area of previous lesions in the MI. In this particular feature they differ from ordinary PMF circuits, in which the CV does not show huge differences in the whole extent of their course. This fact is probably advocating for ablation directed at anatomical rather than functional isthmuses.
Moreover, in our study we found that patients who underwent ΜΙ ablation and had ΑΤ, usually after previous AF ablation, had a much better prognosis than those who underwent MI ablation presenting with AF. Probably, after a sufficient substrate modification the less complex electrophysiological environment can only maintain ATs, which if mapped in detail and treated in a tailored manner, are very likely not to recur.