Abstract
Two-dimensional echocardiography was performed in 16 patients with Ebstein's anomaly to assess right ventricular anatomy and function in relation to clinical features and prognosis. Measurements of right ventricular anatomy and function were established in 10 normal subjects for comparison. Ten patients were in New York Heart Association functional class I, four in class II and one each in classes III and IV. Right ventricular morphology and the three tricuspid valve leaflets were assessed from right ventricular inflow tract and apical four chamber views. The anterior tricuspid leaflet was abnormal but not displaced in all patients; the septal and posterior leaflets were displaced in 14 (88%) and 11 (69%) patients respectively. The posterior leaflet was best visualized from the right ventricular inflow tract, and in two patients this view was required for the echocardiographic diagnosis of Ebstein's anomaly, based on displacement of the septal tricuspid valve leaflet. An index of right ventricular function, the fractional area contraction, was defined as the difference between the end-diastolic and the end-systolic area, normalized to the end-diastolic area. This index was calculated for both the proximal (atrialized) right ven...Continue Reading
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