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.