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CMR analysis of the pulmonary vein encirclement. A path was drawn around each pulmonary vein encirclement (A) and signal intensities analysed within a 5-mm corridor (B). In order to characterize scar width and continuity, the encirclement was subdivided into equal sectors and signal intensities and spatial location of high signal intensity points analysed per sector (C). CMR, cardiovascular magnetic resonance.
