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Assessments of pulmonary vein and left atrial anatomical variants in atrial fibrillation patients for catheter ablation with cardiac CT

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Abstract

Objectives

To provide a road map of pulmonary vein (PV) and left atrial (LA) variants in patients with atrial fibrillation (AF) before catheter ablation procedure using cardiac CT.

Methods

Cardiac CT was performed in 1420 subjects for accurate anatomical information, including 710 patients with AF and 710 matched controls without AF. PV variants, PV ostia and spatial orientation, LA enlargement, and left atrial diverticulum (LAD) were measured, respectively. Differences between these two groups were also respectively compared. Some risk factors for the occurrence of LAD were analyzed.

Results

In total, PV variants were observed in 202 (28.5 %) patients with AF patients and 206 (29.0 %) controls without AF (p = 0.8153). The ostial sizes of all accessory veins were generally smaller than those of the typical four PVs (p = 0.0153 to 0.3958). There was a significant difference of LA enlargement between the AF and control groups (36.3 % vs. 12.5 %, p < 0.0001), while the prevalence of LAD was similar in these two groups (43.2 % vs. 41.9 %, p = 0.6293).

Conclusion

PV variants are common. Detailed knowledge of PVs and LA variants are helpful for providing anatomical road map to determine ablation strategy.

Key points

PVs variants are helpful for providing anatomical road map to ablation.

PV variants are common.

DSCT could recognize these anatomic features before ablation as a non-invasive imaging.

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Acknowledgments

The scientific guarantor of this publication is Zhi-gang Yang, West China Hospital of Sichuan University. The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article. No complex statistical methods were necessary for this paper. Institutional Review Board approval was obtained. An application for exemption of patients’ informed consents was approved by the Institutional Review Board (IRB) in our hospital as its retrospective characteristic. This work was partly supported by the National Natural Science Foundation of China (81271625, 81471721, and 81471722 ) and Program for New Century Excellent Talents in University (No:NCET-13-0386). Methodology: retrospective, cross sectional study, performed at one institution.

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Correspondence to Zhi-Gang Yang or Ying-Kun Guo.

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Zhi-Gang Yang and Ying-Kun Guo contributed equally to this work.

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Chen, J., Yang, ZG., Xu, HY. et al. Assessments of pulmonary vein and left atrial anatomical variants in atrial fibrillation patients for catheter ablation with cardiac CT. Eur Radiol 27, 660–670 (2017). https://doi.org/10.1007/s00330-016-4411-6

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  • DOI: https://doi.org/10.1007/s00330-016-4411-6

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