Moderated Posters session: advanced echo techniques in congenital heart diseaseP526Systolic function by strain echocardiography is related to cardiac fibrosis and arrhythmias in hypertrophic cardiomyopathyP527Natural history of bicuspid aortic valve valvulo-aortopathy in affected patients followed in a single centerP528Postsystolic thickening as a likely sign of altered deformation due to pressure overload in a Marfan murine model.P529Strain rate echocardiography in patients with hypertrophic cardiomyopathy undergoing surgical myectomy.P530Transthoracic echocardiography is a safe alternative for assessment and guidance of transcatheter closure of secundum atrial septal defect in childrenP531Aortic root dilatation and stiffness assessed by m