PMC:6019327 / 256260-257738 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/6019327","sourcedb":"PMC","sourceid":"6019327","source_url":"https://www.ncbi.nlm.nih.gov/pmc/6019327","text":"The complex anatomy of the LA plays a major role in the pathophysiology of AF.771 A detailed understanding of this anatomy is essential for a safe and effective AF ablation procedure.772 There is a significant inter- and intrapatient variability in the number, size, and bifurcation of the PVs67,773, 774,775,776,777,778 (Figure 2). Common variations include supernumerary right PVs (18%–29%) and common trunk (\u003e30%), mainly located on the left side and right middle or right top PV.69,776 Knowledge of the presence of additional veins prevents placing ablation lesions over their ostia, which could result in PV occlusion, whereas knowledge of the bifurcation pattern is essential during CB PVI, in which wiring of various branches might be needed to ensure optimal occlusion.779 LA imaging facilitates ablation by providing detailed anatomical description of the PVs, antrum, and the remainder of the LA, enabling selection of the most suitable ablation technique prior to the procedure.772,780 During the procedure, integration of LA images obtained by CT or MRI reduces procedural time because it enables a more accurate reconstruction of the anatomy.41 However, this requires accurate registration. Prior to RF ablation, imaging of LA anatomy with either MRI or CT imaging is performed routinely by 59% of the writing group members. Prior to CB, AF ablation imaging of the LA anatomy with either MRI or CT imaging is performed routinely by 56% of the writing group 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