Background: Treadmill exercise stress echocardiography (ESE) is both feasible and safe in the pediatric population. Although regional wall motion abnormalities (RWMAs) have limited diagnostic utility, Doppler studies frequently demonstrate significant intraventricular pressure gradients (IVPGs) during exercise. These IVPGs, which were observed in 39% of 258 previously studied adolescents, are absent at rest. Th...