Buchanan KD, et al. - In this retrospective analysis, researchers assessed the prognostic significance of contractile reserve (CR) at baseline in 61 patients with low-flow, low-gradient severe aortic stenosis (AS; mean transvalvular aortic gradient < 40 mmHg, LVEF < 50%, and AVA ≤ 1.0 cm² or AVAi ≤ 0.6 cm²) undergoing transcatheter aortic valve replacement (TAVR). These patients had a pre-TAVR dobutamine stress echocardiogram (DSE). Overall 31 patients (51%) and 30 (49%) patients had CR present and absent, respectively. All-cause mortality at 30 days or 1 year was not predicted by the presence or absence of CR in this study population.