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Funding Acknowledgements Type of funding sources: None. Introduction Paradoxical aortic stenosis (AS) is low-flow (SVi ≤ 35ml/m2) , low- gradient (Mean PG ≤ 40mmHg) severe aortic stenosis (AVA &amp;lt; 1cm2) in patients with preserved ejection fraction (EF ≥ 50%) usually associated with female gender, advanced age, small body size and history of hypertension. Left ventricular (LV) reverse remodeling presents with LV hypertrophy reversal following aortic valve replacement (AVR) and is associated with better long term prognosis. Purpose The purpose of our study was to asses echocardiographic predictors of better outcome in patients with paradoxical severe AS following AVR. Methods Detailed transthoracic echocardiographic (TTE) evaluation with left ventricular strain analysis was performed using 2D Philips Epique 7 in patients with severe aortic stenosis with AVR indication before and 4 months after the intervention. Results Among 75 patients with severe AS and indication for AVR, 20 (31, 7%) were paradoxical AS with low- flow, low –gradient and preserved ejection fraction. Sixty percent were female and eighty percent had hypertension where all echocardiographic parameters improved following AVR including improvement of LV global longitudinal strain (LS) as well as reduction of left ventricular mass indicating left ventricular reverse remodeling (Figure 1). The patients with paradoxical AS compared to the other forms of severe AS had the lowest values for MAPSE and s’TDI before and after AVR. Independent predictors of LV reverse remodeling before AVR were end systolic LV volume (ESV) , AVA/BSA and the number of segments with LS &amp;lt; 13%. Conclusion Paradoxical severe AS is associated with worse post AVR prognosis compared to the high gradient severe AS.  Echocardiographic predictors of LV reverse remodeling in patients with paradoxical severe AS following AVR are LV ESV, AVA/BSA and number of segments with LS &amp;lt; 13%. Timely diagnosis and AVR referral of patients with paradoxical severe AS is of major importance in the management of aortic valvular disease. Abstract Figure. Descriptive of 20pts with paradoxical AS  Abstract Figure. Predictors of LV reverse remodeling

Echocardiographic predictors of left ventricular reverse remodeling after aortic valve replacement in patients with paradoxical aortic stenosis