The Dissimilar Impact in Atrial Substrate Modificationof Left and Right Pulmonary Veins Isolation after Catheter Ablation of Paroxysmal Atrial Fibrillation.

However, modification of HRA ( D u r a t i o n ) showed a trend when values in the beginning and the end of the procedure were measured ( B-R comparison), possibly due to a cumulative effect of CA in AF substrate which can be better appreciated quantitatively when isolation is totally performed.

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