Atrial scar on late gadolinium-enhanced imaging to predict electrical reconnection after pulmonary vein isolation for atrial fibrillation
نویسندگان
چکیده
Methods LGE CMR was performed 3 months after PVI in 24 patients with paroxysmal AF (age 62 ± 9 years, 4 women). Imaging was performed 15 min after contrast in transaxial and sagital orientations using an inversion-recovery prepared and respiratory navigated 3D turboFLASH sequence with fat saturation (pixel size 1.25 × 1.25 × 2.5 mm). Scar burden (mL) was quantified on transaxial images using adaptive thresholding, with a threshold set 3SD above mean blood pool signal. In addition, scar circumferentiality was assessed visually by 2 observers in consensus, potential gaps being distributed on 4 sectors per vein (sup, ant, inf, post). 1 to 3 days after CMR, all patients underwent a systematic electrophysiological study, regardless of potential AF recurrence, in order to assess for PV reconnection. Each reconnection was characterized by high density activation mapping and distributed on the same sectors.
منابع مشابه
Combining acquisition and image processing methods to improve evaluation of arial wall scar patterns after pulmonary vein isolation
Background Pulmonary vein isolation (PVI) is a therapy to treat patients with atrial fibrillation (AF) but suffers a >30% recurrence rate. Studies have shown that gaps in the scar pattern encircling the pulmonary veins are linked to recurrence. Co-registering angiography images of the atrial blood pool to late gadolinium enhanced (LGE) images of the atrial wall to determine scar pattern suffer ...
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