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European Radiology

, Volume 16, Issue 12, pp 2757–2767 | Cite as

Assessment of pulmonary venous stenosis after radiofrequency catheter ablation for atrial fibrillation by magnetic resonance angiography: a comparison of linear and cross-sectional area measurements

  • Jaroslav TintěraEmail author
  • Václav Porod
  • Robert Čihák
  • Hanka Mlčochová
  • Eva Rolencová
  • Pavel Fendrych
  • Josef Kautzner
Cardiac

Abstract

One of the recognised complications of catheter ablation is pulmonary venous stenosis. The aim of this study was to compare two methods of evaluation of pulmonary venous diameter for follow-up assessment of the above complication: (1) a linear approach evaluating two main diameters of the vein, (2) semiautomatically measured cross-sectional area (CSA). The study population consists of 29 patients. All subjects underwent contrast-enhanced magnetic resonance angiography (CeMRA) of the pulmonary veins (PVs) before and after the ablation; 14 patients were also scanned 3 months later. PV diameter was evaluated from two-dimensional multiplanar reconstructions by measuring either the linear diameter or CSA. A comparison between pulmonary venous CSA and linear measurements revealed a systematic difference in absolute values. This difference was not significant when comparing the relative change CSA and quadratic approximation using linear extents (linear approach). However, a trend towards over-estimation of calibre reduction was documented for the linear approach. Using CSA assessment, significant PV stenosis was found in ten PVs (8%) shortly after ablation. Less significant PV stenosis, ranging from 20 to 50% was documented in other 18 PVs (15%). CeMRA with CSA assessment of the PVs is suitable method for evaluation of PV diameters.

Keywords

Atrial fibrillation Pulmonary veins MR angiography Catheter ablation 

Notes

Acknowledgement

This study was supported by a grant from the Internal Grant Agency of the Czech Ministry of Health IGA NA/7381-3.

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Jaroslav Tintěra
    • 1
    Email author
  • Václav Porod
    • 1
  • Robert Čihák
    • 2
  • Hanka Mlčochová
    • 2
  • Eva Rolencová
    • 1
  • Pavel Fendrych
    • 1
  • Josef Kautzner
    • 2
  1. 1.Department of RadiologyInstitute for Clinical and Experimental MedicinePrague 4Czech Republic
  2. 2.Department of CardiologyInstitute for Clinical and Experimental MedicinePrague 4Czech Republic

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