An objective and reproducible method for quantification of aortic regurgitation after TAVI

Carl Schultz, TLB Slots, G Yong, JP Aben, Nicolas van Mieghem, M Swaans, Zouhair Rahhab, Nahid El Faquir, Robert Jan van Geuns, G Mast, Felix Zijlstra, Peter de Jaegere

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Abstract

Aims: We describe a new semi-automated method that measures aortic regurgitation (AR) on contrast aortography with the objectives of reducing the inter-observer variability and standardising image acquisition. Methods and results: Aortograms from three participating centres were reviewed to generate the following quality criteria: entire left ventricle and aortic root in view, descending aorta or TOE probe not over-projected, breath hold, no table motion, and adequate contrast opacification of the aortic root. AR was visually graded (Sellers) and was quantified by measuring the area under time-contrast density curves in the aortic root (reference) and the left ventricle. Quality criteria were met in 44 retrospectively identified aortograms and in 22 (69%) of 32 prospectively collected aortograms. The visual AR grade (Sellers) was highly correlated with time-density measurements including relative area under the curve (RAUC) and qRA index (r=0.81 and 0.83, respectively, p<0.001). Inter-observer reproducibility of visual grading was moderate (kappa 0.47-0.60, p<0.001). Inter-observer measurement of RAUC and qRA index were highly correlated (r=0.98, p<0.001) and showed a high level of agreement. Conclusions: Quantification of aortic regurgitation by measurement of time-density changes on contrast aortography may improve the reproducibility of AR assessment in the catheter laboratory. Steps for standardised aortography acquisition are proposed.
Original languageUndefined/Unknown
Pages (from-to)355-363
Number of pages9
JournalEuroIntervention
Volume10
Issue number3
DOIs
Publication statusPublished - 2014

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