Angiographic assessment of aortic regurgitation by video-densitometry in the setting of TAVI: Echocardiographic and clinical correlates
Objectives: We sought to investigate a new angiographic method for aortic regurgitation (AR) severity assessment in the setting of transcatheter aortic valve implantation (TAVI). Background: AR after TAVI is common but challenging to quantitate, especially in the cath-lab. Methods: In 228 patients, AR was quantitated before and after TAVI by echocardiography and by video-densitometric analysis of aortograms. Contrast time-density curves for the aortic root (the reference region) and the left ventricular outflow tract, LVOT were generated. LVOT-AR was calculated as the area under the curve of the LVOT as a fraction of the area under the curve of the reference region. Results: LVOT-AR was 0.10 ± 0.08, 0.13 ± 0.10 and 0.28 ± 0.14 in none-trace, mild and moderate-severe post-TAVI AR as defined by echocardiography (P < 0.001) and a cutpoint of >0.17 corresponded to moderate-severe AR on echocardiography (area under the curve = 0.84). At follow-up (median, 496 days), patients with LVOT-AR≤0.17 showed a significant reduction of LV mass index (LVMi; 121 [95-148] vs. 140 [112-169] g/m2, P = 0.009) and the prevalence of LV hypertrophy (LVH; 64 vs. 88%, P = 0.001) compared to baseline. In patients with LVOT-AR > 0.17, LVMi (149 [121-178] vs. 166 [144-188] g/m2, P = 0.14) and the prevalence of LVH (74 vs. 87%, P = 0.23) did not show a significant change. Compared to patients with LVOT-AR≤0.17, those with LVOT-AR > 0.17 had an increased 30-day (16.4% vs. 7.1%, P = 0.035) and one year mortality (32.9 vs. 14.2%, log rank P value = 0.001; HR: 2.690 [1.461-4.953], P = 0.001). Conclusions: LVOT-AR > 0.17 corresponds to greater than mild AR as defined by echocardiography and predicts impaired LV reverse remodeling and increased early and midterm mortality after TAVI.
|Keywords||Angiography, Aortic stenosis, Echocardiography, Paravalvular regurgitation, Transcatheter aortic valve implantation|
|Persistent URL||dx.doi.org/10.1002/ccd.26926, hdl.handle.net/1765/95647|
|Journal||Catheterization and Cardiovascular Interventions|
Abdelghani, M, Tateishi, H, Miyazaki, Y. (Yosuke), Cavalcante, R, Soliman, O.I.I, Tijssen, J.G.P, … Serruys, P.W.J.C. (2016). Angiographic assessment of aortic regurgitation by video-densitometry in the setting of TAVI: Echocardiographic and clinical correlates. Catheterization and Cardiovascular Interventions. doi:10.1002/ccd.26926