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Outcomes After Transcatheter Aortic Valve Replacement in Bicuspid Versus Tricuspid Anatomy: A Systematic Review and Meta-Analysis

https://doi.org/10.1016/j.jcin.2021.07.052Get rights and content
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Abstract

Objectives

The aim of this study was to compare the feasibility, safety, and clinical outcomes of transcatheter aortic valve replacement (TAVR) in bicuspid aortic valve (BAV) versus tricuspid aortic valve (TAV) stenosis.

Background

At present, limited observational data exist supporting TAVR in the context of bicuspid anatomy.

Methods

Primary endpoints were 1-year survival and device success. Secondary endpoints included moderate to severe paravalvular leak (PVL) and a composite endpoint of periprocedural complications; incidence rates of individual procedural endpoints were also explored individually.

Results

In the main analysis, 17 studies and 181,433 patients undergoing TAVR were included, of whom 6,669 (0.27%) had BAV. A secondary analysis of 7,071 matched subjects with similar baseline characteristics was also performed. Device success and 1-year survival rates were similar between subjects with BAV and those with TAV (97% vs 94% [P = 0.55] and 91.3% vs 90.8% [P = 0.22], respectively). In patients with BAV, a trend toward a higher risk for periprocedural complications was observed in our main analysis (risk ratio [RR]: 1.12; 95% CI: 0.99-1.27; P = 0.07) but not in the matched population secondary analysis (RR: 1.00; 95% CI: 0.81-1.24; P = 0.99). The risk for moderate to severe PVL was higher in subjects with BAV (RR: 1.42; 95% CI: 1.29-1.58; P < 0.0001) as well as the incidence of cerebral ischemic events (2.4% vs 1.6%; P = 0.015) and of annular rupture (0.3% vs 0.02%; P = 0.014) in matched subjects.

Conclusions

TAVR is a feasible option among selected patients with BAV anatomy, but the higher rates of moderate to severe PVL, annular rupture, and cerebral ischemic events observed in the BAV group warrant caution and further evidence.

Key Words

aortic stenosis
bicuspid aortic valve
heart team
TAVR
transcatheter aortic valve replacement

Abbreviations and Acronyms

BAV
bicuspid aortic valve
PVL
paravalvular leak
RR
risk ratio
TAV
tricuspid aortic valve
TAVR
transcatheter aortic valve replacement
TIA
transient ischemic attack

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The authors attest they are in compliance with human studies committees and animal welfare regulations of the authors’ institutions and Food and Drug Administration guidelines, including patient consent where appropriate. For more information, visit the Author Center.

Drs Montalto and Sticchi contributed equally to this work.