746 Assessment of intracardiac fluid-dynamics of patients with aortic stenosis

Abstract

Abstract Aims Recent technological developments enabled visualization of intracardiac flow patterns. This study aims to evaluate intracardiac flow dynamics of patients with aortic stenosis (AS). Methods and results Sixty-one patients with severe AS and 38 healthy sex- and BSA-matched controls (CTRL) were prospectively included. Standard echocardiographic assessment was performed in all patients. Fluid dynamics were evaluated using the HyperDoppler software to measure vortex area (VA), vortex length (VL), and vortex depth (VD). The assessment of VA, VL, and VD was feasible and reliable, as the inter-rater variability (ICCs) were very good for VA (0.878, P = 0.033), VL (0.960, P = 0.004), and VD (0.905, P = 0.021). Mean VA, VL, and VD (P = 0.033, P = 0.026, and P > 0.001, respectively) were significantly larger in AS patients compared with CTRL. A significant difference in the delta values of VA and VL, reflecting their change from before to after TAVI, was observed in patients with and without significant paravalvular leak. Conclusions The newly developed quantitative indices of flow dynamics, namely VA, VL, and VD, were significantly increased in the LV of patients with severe AS compared to controls and their measurement was feasible and reliable in a clinical setting.