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Background Tetralogy of Fallot (TOF) represents approximately 7%-10% of congenital heart diseases (CHDs), and it is the most common cyanotic CHD, with 0.23-0.63 cases per 1,000 births. In our case report we are reviewing the added value of three dimensional echocardiography in the assessment of degree of infundibular and valvular stenosis in tetralogy of Fallot. Case report A 29-year-old female patient with history of congenital heart disease (Fallot’s tetrology) and history of total surgical correction at the age of 10 presented to our facility by dyspnea grade III that started 1 month before presentation .On examination; an ejection systolic murmur was heard over the pulmonary area with palpable thrill. Electrocardiogram (ECG) revealed normal sinus rhythm with a heart rate of 75bpm with right axis deviation and right ventricular hypertrophy voltage criteria. Transthoracic two dimensional echocardiography revealed increased thickness of the right ventricle (RV) free wall , and aliasing of the color Doppler flow across the right ventricular outflow tract (RVOT) with a peak systolic gradient across the RVOT 69mmHg . By performing three dimensional transesophageal echocardiography we were able to demonstrate the RVOT narrowing in RVOT enface view and by using specific software we were able to demonstrate the morphology of the pulmonary valve and the pulmonary valve orifice area and we found that the pulmonary valve is a bicuspid valve as shown and the pulmonary valve orifice area was 3.8cm2 signifying the absence of significant valvular stenosis. Conclusion 3D echocardiography in adult congenital heart disease provides unique projections from the living complex anatomy (such as en face views) and true volumetric quantification without geometric assumptions Abstract P696 Figure. Infundibular stenosis

european heart journal. cardiovascular imaging

P696 The role of three dimensional echocardiography in a case of recurrent infundibular pulmonary stenosis in a surgically corrected tetralogy of fallot