P981Lvot area measurement using gated ct data reclassifies aortic stenosis severity as graded by echocardiographyP982Paradoxical low-flow low-gradient aortic stenosis: an intermediate state between moderate and severe aortic stenosis?P983Can rheumatic significant mitral stenosis be a cause of paradoxical low gradient, low flow, in patients with severe aortic stenosis? an echocardiographic and outcome studyP984Clinical and hemodynamic comparison of isolated versus combined aortic and mitral stenosisP985Echocardiographic end-diastolic velocity in the proximal descending aorta should be interpreted with caution when the ascending aorta is dilated: insights from cardiovascular magnetic resonanceP987Prevalence of atrial mitral regurgitation in patients with severe mitral regurgitationP988Role of 2D/3D echocardiography in the risk stratification of endocardial lead-related tricuspid regurgitation: a single-centre study among?241 patientsP989When TEE is needed in patients with staphylococcus aureus bacteremia for the assessment of risk profile of infective endocarditis?P990Appropriateness criteria to echocardiograms for suspected infective endocarditis: experience of a tertiary referral centerP991Independent predictors of outcome in infective endocarditisP992The role of transesophageal cardiography in clinical course and prognosis of complicated infective endocarditis in critically ill patients: our 15 years experienceP993Left bundle branch block atypical pattern as a prognostic determinant in patients taken to TAVIP994Efficacy of long-term ivabradine therapy in severe systolic chronic heart failure patients with and without type 2 diabetes mellitusP995Relations between left ventricular reverse remodeling and serum markers of extracellular matrix fibrosis in dilated cardiomyopathyP996The healthy left ventricle accommodates an increasing vortex formation time for volume transfer in diastolic filling :Implications for heart failureP997Evolutionary changes of pulmonary artery pressure after left ventricular assist device implantP998Functional correlates and prognostic value of coronary flow velocity reserve by vasodilator stress echocardiography in hypertrophic cardiomyopathyP999Quantification of myocardial performance in patients with non-obstructive versus latent-obstructive hypertrophic cardiomyopathyP1000Lifelong arrhythmic risk stratification in arrhythmogenic right ventricular cardiomyopathy: distribution of events and impact of periodical reassessmentP1001Impact of fibrosis visualized by CMR in vectorcardiogram recordings of patients with suspected arrhythmogenic cardiomyopathyP1002Determinants of the beneficial effect of aldosterone antagonism on exercise capacity in heart failure with reduced ejection fractionP1003Myocardial strain values in patients with acute myocarditis and preserved ejection fraction. A magnetic resonance feature tracking studyP1004Detection of subclinical left ventricular dysfunction by speckle tracking echocardiography in patients with myocarditis without prominent wall motion abnormalitiesP1005Aborted sudden cardiac death patients aged <50 years show only mild alterations on cardiac magnetic resonance imagingP1006Relationships between subepicardial and subendocardial longitudinal strain with late gadolinium enhancement in uncomplicated hypertensive patients

Background Measurement of left ventricular outflow tract (LVOT) diameter and area for estimation of aortic valve area (AVA) using transthoracic echocardiography (TTE) and the continuity equation assumes circular LVOT. The use of direct planimetric measurement of LVOT area by gated-CT can theoretically improve accuracy of AVA calculation. Purpose We aim to assess reproducibility of LVOT echo measurement and its correlation and agreement with Gated CT measurements. In the subgroup with aortic stenosis (AS) we secondarily assessed the potential change in AS severity using LVOT area by CT instead of TTE in the continuity equation. Methods We retrospectively studied 93 patients, 43 of whom with severe AS. LVOT Area was measured with 2D TTE by 2 expert echocardiographers and gated-CT by 2 expert radiologists; inter-reader agreement and inter-method (Echo vs gated CT) agreement and correlation were measured. Finally we used the measurement of CT scan in the continuity equation instead of TTE measurement to assess potential reclassification of AS severity. Results Mean age was 78&#177;11. Table shows inter-reader and inter-method agreement and correlation. The correlation between 2 echocardiophers for LVOT measurements was good (rho = 0,77) although not perfect. Out of 43 severe AS, defined as AVA