Rapid Fire Abstract session: assessing the single ventricule and new techniques for assessing tetralogy477Echocardiographic assessment of ventricular function and predictors of mortality in adults with a Fontan circulation478The left pulmonary artery doppler in the assessment of atrial restriction after the hybrid procedure for hypoplastic left heart syndrome479Magnetic resonance imaging in patients with Fontan physiology detects a high prevalence of liver lesions480NT-proBNP as marker of right ventricular dilatation and pulmonary regurgitation after surgical correction of tetralogy of fallot481Right ventricular postsystolic shortening is associated with diastolic dysfunction in children after tetralogy of fallot repair.482Multimodality ass