1. Echocardiographic evaluation of left ventricular outflow tract obstruction in complete transposition of the great arteries
- Author
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Paola D'Addio, Maurizio Burattini, Raffaele Gentile, and Antonio Vitarelli
- Subjects
Adult ,Male ,medicine.medical_specialty ,Adolescent ,Heart Ventricles ,Transposition of Great Vessels ,medicine.medical_treatment ,Ventricular outflow tract obstruction ,Blood Pressure ,Constriction, Pathologic ,cardiac catheterization ,d-transposition of the great arteries ,subpulmonic stenosis ,two-dimensional echocardiography ,Internal medicine ,Mitral valve ,Humans ,Medicine ,Ventricular outflow tract ,Pulmonary Wedge Pressure ,Child ,Pulmonary wedge pressure ,Cardiac catheterization ,business.industry ,Pulmonary Subvalvular Stenosis ,Infant ,Cardiomyopathy, Hypertrophic ,medicine.disease ,Stenosis ,Blood pressure ,medicine.anatomical_structure ,Echocardiography ,Great arteries ,Child, Preschool ,Cardiology ,Female ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business - Abstract
Subpulmonic stenosis in complete d-transposition of the great arteries (d-TGA) is a frequently associated malformation, the precise diagnosis of which is essential for optimal medical and surgical treatment. Sixteen patients with d-TGA and subpulmonic stenosis have been studied by M-mode and two-dimensional (2DE) echocardiography and cardiac catheterization. Dynamic obstruction was found in six patients and fixed stenosis in 10. Systolic anterior motion of the mitral valve without fixed obstruction of the left ventricular outflow tract (LVOT) was present in patients with dynamic stenosis. Measurements of left ventricular end-diastolic posterior wall thickness to minor semiaxis ratio correlated well (p less than 0.001) with the pressure gradient across the LVOT. Various types of anatomic fixed obstruction are described. M-mode echocardiography provides assessment of dynamic obstruction but does not allow quantitative evaluation of the length of the narrowed segment. The latter can be achieved by 2DE, which offers improved definition of different anatomic types.
- Published
- 1984