Abstract
Background
Although balloon sizing has been found to be useful during transcatheter aortic valve implantation (TAVI), its effectiveness in patients with bicuspid aortic valve (BiAV) remains unknown.
Methods
Patients who underwent balloon sizing were retrospectively identified. The study comprised 67 patients (61.2% with BiAV). Preprocedural hypothetical transcatheter heart valve (THV) sizing was based on multislice computed tomography (MSCT) measurements at the annulus. Changes in valve size after balloon sizing were reviewed. Postprocedural MSCT measurements and the grade of paravalvular aortic regurgitation (PAR) were compared.
Results
When comparing patients with a BiAV and those with a tricuspid aortic valve (TiAV), there was no significant difference (p = 0.97) in the proportion of decreased (43.9% vs. 46.2%), unchanged (51.2% vs. 50.0%), or increased (4.9% vs. 3.8%) valve sizes chosen on the basis of MSCT findings. The anticipated annular sizing ratio for patients who received a smaller valve was 7.2% (3.5–10.5%) while it was 15.7% (12.5–19.0) for the others (p < 0.01), and no significant difference in the proportion of mild (or more severe) PAR cases was found between the groups (37.9% vs. 30.6%, p = 0.53 at the 1‑month follow-up). Stent frame expansion and eccentricity index were comparable between the BiAV and TiAV subgroups among patients who received a smaller THV after balloon sizing.
Conclusion
Balloon sizing is a useful tool that is complementary to the current gold standard of MSCT for THV size selection as well as for BiAV morphology assessment.
Zusammenfassung
Hintergrund
Die ballonbasierte Größenbestimmung der Herzklappe wurde zwar als nützlich bei der Transkatheter-Aortenklappenimplantation (TAVI) erachtet, aber ihre Wirksamkeit bei Patienten mit bikuspider Aortenklappe (BiAV) ist bisher nicht bekannt.
Methoden
Retrospektiv wurden Patienten mit ballonbasierter Größenbestimmung der Klappe ermittelt. Die Studie umfasste 67 Patienten (61,2 % mit BiAV). Die präprozedurale hypothetische Transkatheter-Herzklappen(THV)-Größenbestimmung basierte auf Messungen mittels Multislice-Computertomographie (MSCT) am Anulus. Betrachtet wurden Veränderungen der Klappengröße nach ballonbasierter Größenbestimmung. Postprozedurale MSCT-Messungen und der Grad der paravalvulären Aortenregurgitation (PAR) wurden verglichen.
Ergebnisse
Beim Vergleich von Patienten mit BiAV und Patienten mit trikuspidaler Aortenklappe (TiAV) gab es keinen signifikanten Unterschied (p = 0,97) in Bezug auf den Anteil verminderter (43,9 vs. 46,2 %), unveränderter (51,2 vs. 50,0 %) oder erhöhter (4,9 vs. 3,8 %) Klappengrößen, die auf der Grundlage der MSCT-Befunde ausgewählt worden waren. Das antizipierte Größenverhältnis zum Anulus für Patienten, die eine kleinere Klappe erhielten, betrug 7,2 % (3,5–10,5 %), während es für die anderen bei 15,7 % (12,5–19,0) lag (p < 0,01), dabei bestand kein signifikanter Unterschied in Bezug auf den Anteil leichtgradiger (oder schwerer) PAR-Fälle zwischen den Gruppen (37,9 vs. 30,6 %; p = 0,53 beim 1‑Monats-Follow-up). Die Expansion des Stents und der Ekzentrizitätsindex waren zwischen den BiAV- und TiAV-Subgruppen bei Patienten, die eine kleinere THV nach ballonbasierter Größenbestimmung erhielten, vergleichbar.
Schlussfolgerung
Die ballonbasierte Größenbestimmung der Herzklappe ist ein nützliches Verfahren, das den derzeitigen Goldstandard der MSCT ergänzt in Bezug auf die Auswahl der Größe einer THV sowie der Morphologie einer BiAV.
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Funding
This work was supported by National Natural Science Foundation of China (81370219, Bei**g, China); Science and Technology Support Plan of Sichuan province (2016FZ0078); Science and Technology Innovative Research Groups Program of Sichuan province (2017TD0004); “13th Five-Year” National key Research and Development Program of China (2016YFC1102200); West China Hospital “1·3·5” Discipline of Excellence Project-Percutaneous transcatheter aortic valve implantation.
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Y. Feng and M. Chen are consultants/proctors of Venus MedTech. Y.-N. Xu, T.-Y. **ong, Y.-J. Li, Y.-B. Liao, Z.-G. Zhao, and X. Wei declare that they have no competing interests.
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. Informed consent was obtained from all individual participants included in the study.
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Yuan-Ning Xu and Tian-Yuan **ong contributed equally to this work.
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Xu, YN., **ong, TY., Li, YJ. et al. Balloon sizing during transcatheter aortic valve implantation. Herz 45, 192–198 (2020). https://doi.org/10.1007/s00059-018-4714-2
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DOI: https://doi.org/10.1007/s00059-018-4714-2
Keywords
- Transcatheter aortic valve replacement
- Aortic stenosis
- Balloon valvuloplasty
- Bicuspid valve
- Computed tomography