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European Radiology

Erschienen in:

20.06.2018 | Cardiac

Optimal pre-TAVR annulus sizing in patients with bicuspid aortic valve: area-derived perimeter by CT is the best-correlated measure with intraoperative sizing

verfasst von: Yuan Wang, Moyang Wang, Guanyuan Song, Wei Wang, Bin Lv, Hao Wang, Yongjian Wu

Erschienen in: European Radiology | Ausgabe 1/2019

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Abstract

Objective

To clarify the optimal measurements for patients with bicuspid aortic valve (BAV) preferred for transcatheter aortic valve replacement (TAVR), our study compared intraoperative sizing with five different approaches by transthoracic echocardiography (TTE), three-dimensional transesophageal echocardiography (3DTEE) and computed tomography (CT).

Methods

We enrolled 104 BAV patients prescreened for TAVR but who underwent surgery with direct intraoperative annulus sizing. All five approaches [2DTTE, 3DTEE, area-derived perimeter (CTarea), perimeter-derived diameter (CTperi) and mean diameter (CTmean)] were compared with intraoperative sizing, respectively. Agreements on theoretical valve selections by five methods with those by intraoperative sizing were analyzed.

Results

CTarea showed the highest correlation (r = 0.932) and the best agreement with intraoperative sizing. Agreement for theoretical surgical and TAVR prosthesis selection was found in 84.6% and 74.0% BAVs by CTarea (κ = 0.791, κ = 0.585). CTperi-based prosthesis selection led to overestimation of 26.9% for surgical valves (κ = 0.589) and 36.5% for TAVR valves (κ = 0.425). Good correlations were observed between CT measurements and intraoperative sizing regardless of the predominant site of aortic valve calcification (r = 0.860-0.953).

Conclusion

The CTarea, which demonstrated the optimal approach to annulus sizing and prosthesis choice of BAVs with high eccentricity, should be included into the BAV-specific annulus sizing recommendation. The insufficiency of CTperi lay in overestimation of surgical or TAVR valve selections. Good agreement of 3DTEE sizing proved its superiority in annulus sizing for BAVs unsuitable for CT, but it should be used with caution for patients with a calcified annulus, where partial acoustic shadowing could lead to image inaccuracy.

Key Points

• The area-derived perimeter by CT is the optimal approach to annulus sizing of BAVs.

• The perimeter-derived approach is prone to overestimation of BAVs.

• 3DTEE showed its superiority in annulus sizing for BAVs unsuitable for CT, but it should be used with caution in patients with a calcified annulus.

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Titel: Optimal pre-TAVR annulus sizing in patients with bicuspid aortic valve: area-derived perimeter by CT is the best-correlated measure with intraoperative sizing
verfasst von: Yuan Wang
Moyang Wang
Guanyuan Song
Wei Wang
Bin Lv
Hao Wang
Yongjian Wu
Publikationsdatum: 20.06.2018
Verlag: Springer Berlin Heidelberg
Erschienen in: European Radiology / Ausgabe 1/2019
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-018-5592-y

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Optimal pre-TAVR annulus sizing in patients with bicuspid aortic valve: area-derived perimeter by CT is the best-correlated measure with intraoperative sizing

Abstract

Objective

Methods

Results

Conclusion

Key Points

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