Offline ICE/IVUS quantitative images analysis
Images were stored and analyzed offline by two independent operators,
blinded to clinical and procedural data, at the OxACCT CoreLab (Oxford
Academic Cardiovascular CT CoreLab) using QIVUS software (Medis Medical,
Leiden, The Netherlands). Images analysis was performed as previously
outlined 14,15.
Lumen and vessel diameters, areas and sphericity indexes and wall
thickness were measured at the level of the PV ostium as indicated in
Figure 1. The PV ostium was identified as point of maximal inflection
between LA and PV wall, as previously described16.
Comparisons between corresponding PV measurements obtained from ICE and
IVUS frames and between pre- and post-ablation measurements were made.
Post-ablation morphological changes of the PV wall such as
dissection-like changes were recorded.