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Mid-term Outcomes and Predictors of Transarterial Embolization for Type II Endoleak After Endovascular Abdominal Aortic Aneurysm Repair

  • Clinical Investigation
  • Arterial Interventions
  • Published:
CardioVascular and Interventional Radiology Aims and scope Submit manuscript

Abstract

Purpose

To evaluate the mid-term outcomes of transarterial embolization (TAE) for type II endoleak after endovascular abdominal aortic aneurysm repair (EVAR) and investigate the predictors of sac enlargement after embolization.

Materials and Methods

We conducted a retrospective analysis of 55 patients [48 men and 7 women, median age 79.0 (interquartile ranges 74–82) years] who underwent TAE for type II endoleak from 2010 to 2018. The aneurysmal sac enlargement, endoleaks, aneurysm-related adverse event rate, and reintervention rate were evaluated. Patients’ characteristics and clinical factors were evaluated for their association with sac enlargement.

Results

Fifty-five patients underwent TAE with technical success and were subsequently followed for a median of 636 (interquartile ranges 446–1292) days. The freedom from sac enlargement rates at 1, 3, and 5 years was 73.2%, 32.0%, and 26.7%, respectively. After initial TAE, the recurrent type II, delayed type I, and occult type III endoleak were identified in 39 (71%), 5 (9%), and 3 (5%) patients, respectively. Although a patient had aorto-duodenal fistula, there was no aneurysm-related death. The freedom from reintervention rates was 84.6%, 35.7%, and 17.0%, respectively. In the multivariate analysis, sac diameter > 55 mm at initial TAE (hazard ratios, 3.23; 95% confidence intervals, 1.22–8.58; P < 0.05) was a significant predictor of sac enlargement.

Conclusion

TAE for type II endoleak was not effective in preventing sac enlargement, and reinterventions were required among the mid-term follow-up. The sac diameter > 55 mm at initial TAE was a significant predictor of sac enlargement.

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Abbreviations

TAE:

Transarterial embolization

T2EL:

Type II endoleak

T1EL:

Type I endoleak

T3EL:

Type III endoleak

ARAE:

Aneurysm-related adverse event

IMA:

Inferior mesenteric artery

LA:

Lumbar artery

NBCA:

N-butyl-2-cyanoacrylate

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This study was not supported by any funding.

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Correspondence to Takuya Okada.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required. The institutional review board approved this retrospective study.

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Horinouchi, H., Okada, T., Yamaguchi, M. et al. Mid-term Outcomes and Predictors of Transarterial Embolization for Type II Endoleak After Endovascular Abdominal Aortic Aneurysm Repair. Cardiovasc Intervent Radiol 43, 696–705 (2020). https://doi.org/10.1007/s00270-020-02436-2

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  • DOI: https://doi.org/10.1007/s00270-020-02436-2

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