Vasileios Kamperidis1, Philippe J van Rosendael2, Spyridon Katsanos2, Frank van der Kley2, Madelien Regeer2, Ibtihal Al Amri2, Georgios Sianos3, Nina Ajmone Marsan2, Victoria Delgado2, Jeroen J Bax4. 1. Department of Cardiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, PO Box 9600, 2300 RC Leiden, The Netherlands Department of Cardiology, AHEPA University Hospital, Thessaloniki, Greece. 2. Department of Cardiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, PO Box 9600, 2300 RC Leiden, The Netherlands. 3. Department of Cardiology, AHEPA University Hospital, Thessaloniki, Greece. 4. Department of Cardiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, PO Box 9600, 2300 RC Leiden, The Netherlands j.j.bax@lumc.nl.
Abstract
AIMS: Low gradient severe aortic stenosis (AS) with preserved left ventricular ejection fraction (LVEF) may be attributed to aortic valve area index (AVAi) underestimation due to the assumption of a circular shape of the left ventricular outflow tract (LVOT) with 2-dimensional echocardiography. The current study evaluated whether fusing Doppler and multidetector computed tomography (MDCT) data to calculate AVAi results in significant reclassification of inconsistently graded severe AS. METHODS AND RESULTS: In total, 191 patients with AVAi < 0.6 cm2/m2 and LVEF ≥ 50% (mean age 80 ± 7 years, 48% male) were included in the current analysis. Patients were classified according to flow (stroke volume index <35 or ≥35 mL/m2) and gradient (mean transaortic pressure gradient ≤40 or >40 mmHg) into four groups: normal flow-high gradient (n = 72), low flow-high gradient (n = 31), normal flow-low gradient (n = 46), and low flow-low gradient (n = 42). Left ventricular outflow tract area was measured by planimetry on MDCT and combined with Doppler haemodynamics on continuity equation to obtain the fusion AVAi. The group of patients with normal flow-low gradient had significantly larger AVAi and LVOT area index compared with the other groups. Although MDCT-derived LVOT area index was comparable among the four groups, the fusion AVAi was significantly larger in the normal flow-low gradient group. By using the fusion AVAi, 52% (n = 24) of patients with normal flow-low gradient and 12% (n = 5) of patients with low flow-low gradient would have been reclassified into moderate AS due to AVAi ≥ 0.6 cm2/m2. CONCLUSION: The fusion AVAi reclassifies 52% of normal flow-low gradient and 12% of low flow-low gradient severe AS into true moderate AS, by providing true cross-sectional LVOT area. Published on behalf of the European Society of Cardiology. All rights reserved.
AIMS: Low gradient severe aortic stenosis (AS) with preserved left ventricular ejection fraction (LVEF) may be attributed to aortic valve area index (AVAi) underestimation due to the assumption of a circular shape of the left ventricular outflow tract (LVOT) with 2-dimensional echocardiography. The current study evaluated whether fusing Doppler and multidetector computed tomography (MDCT) data to calculate AVAi results in significant reclassification of inconsistently graded severe AS. METHODS AND RESULTS: In total, 191 patients with AVAi < 0.6 cm2/m2 and LVEF ≥ 50% (mean age 80 ± 7 years, 48% male) were included in the current analysis. Patients were classified according to flow (stroke volume index <35 or ≥35 mL/m2) and gradient (mean transaortic pressure gradient ≤40 or >40 mmHg) into four groups: normal flow-high gradient (n = 72), low flow-high gradient (n = 31), normal flow-low gradient (n = 46), and low flow-low gradient (n = 42). Left ventricular outflow tract area was measured by planimetry on MDCT and combined with Doppler haemodynamics on continuity equation to obtain the fusion AVAi. The group of patients with normal flow-low gradient had significantly larger AVAi and LVOT area index compared with the other groups. Although MDCT-derived LVOT area index was comparable among the four groups, the fusion AVAi was significantly larger in the normal flow-low gradient group. By using the fusion AVAi, 52% (n = 24) of patients with normal flow-low gradient and 12% (n = 5) of patients with low flow-low gradient would have been reclassified into moderate AS due to AVAi ≥ 0.6 cm2/m2. CONCLUSION: The fusion AVAi reclassifies 52% of normal flow-low gradient and 12% of low flow-low gradient severe AS into true moderate AS, by providing true cross-sectional LVOT area. Published on behalf of the European Society of Cardiology. All rights reserved.
Authors: Shiying Liu; Jessica Churchill; Lanqi Hua; Xin Zeng; Valerie Rhoades; Mayooran Namasivayam; Vinit Baliyan; Brian B Ghoshhajra; Tony Dong; Jacob P Dal-Bianco; Jonathan J Passeri; Robert A Levine; Judy Hung Journal: J Am Soc Echocardiogr Date: 2020-04 Impact factor: 5.251
Authors: Jamila Boulif; Alisson Slimani; Siham Lazam; Christophe de Meester; Sophie Piérard; Agnès Pasquet; Anne-Catherine Pouleur; David Vancraeynest; Gébrine El Khoury; Laurent de Kerchove; Bernhard L Gerber; Jean-Louis Vanoverschelde Journal: Front Cardiovasc Med Date: 2021-05-17