Key result
Novel A-ring reduces diastolic aortic annulus diameter ~20% versus native roots while preserving distensibility.
Why the study?
Annular stability is increasingly recognized as playing a key role in successful aortic valve repair, prompting evaluation and comparison of a novel open aortic annuloplasty ring with the Dacron ring.
Does the novel A-ring reduce aortic annulus diameter and maintain distensibility compared to the Dacron ring and native roots in an in vitro model?
Does the novel A-ring reduce aortic annulus diameter and maintain distensibility compared to the Dacron ring and native roots in an in vitro model?
The novel expansible A-ring effectively downsizes the aortic annulus while maintaining root distensibility similarly to the standard Dacron ring in an in vitro model.
Answers are grounded in this paper and cite their sources.
Hypothesis-generating for expansible rings in aortic repair; requires human trials before any clinical adoption.
An increasing body of research indicates that annular stability plays a key role for a successful aortic valve repair. The aim of this study was to evaluate and compare a novel open aortic annuloplasty ring (the A-ring) with the Dacron ring. Both rings were compared with native aortic roots in vitro. Eighteen aortic roots were included in the study and randomized into three groups: the native, Dacron, and A-ring group. The roots were evaluated in an in vitro physiologic pulsatile model simulating the left side of the heart. Aortic annulus diameters were significantly reduced both in the Dacron ring group (p = 0.003) and the A-ring group (p = 0.020) when compared with the native group. Both the Dacron ring and A-ring effectively downsized the aortic annulus diameter. The A-ring also displayed an ability to maintain aortic root distensibility during the cardiac cycle equally to the Dacron ring.
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Noor et al. (2023) studied Aortic root dilatation (in vitro model) (n=18). A-ring (novel open aortic annuloplasty ring) vs. Dacron ring and native aortic root was evaluated on Aortic annulus diameter in diastole (mm) (p=0.020). The novel A-ring significantly reduced the diastolic aortic annulus diameter compared to native roots (15.8 mm vs 19.8 mm) while maintaining aortic root distensibility equally to the Dacron ring.
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