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  • Title: Two-dimensional echocardiographic prospective diagnosis of common truncus arteriosus in infants.
    Author: Riggs TW, Paul MH.
    Journal: Am J Cardiol; 1982 Dec; 50(6):1380-4. PubMed ID: 7148717.
    Abstract:
    Two-dimensional echocardiographic prospective diagnosis of truncus arteriosus was made in 7 infants. Two infants had truncus arteriosus type I, 3 patients had truncus arteriosus type II, 1 infant had truncal valve stenosis with an interrupted aortic arch, and 1 had type IV truncus arteriosus with pulmonary hypertension. Multiple imaging views were utilized to confirm the diagnosis. The parasternal long-axis view demonstrated the great vessel-ventricular septal override and the origin of the pulmonary arteries from the posterior aspect of the ascending truncus. The suprasternal notch image facilitated identification of the left- or right-side aortic arch and the origin of the pulmonary arteries from the truncus. Transverse imaging sections at the base of the heart facilitated identification of the pulmonary artery origin of truncus arteriosus type I. Subcostal coronal and sagittal views imaged the common truncus and the ventricular septal defect. These echocardiographic images were contrasted with and discriminated from those of an infant with aorticopulmonary window with intact ventricular septum. Although cardiac catheterization and angiography may be required to assess pulmonary arterial pressure, pulmonary vascular resistance, and the distal pulmonary arterial anatomy in truncus arteriosus, 2-dimensional echocardiography can be used to correctly establish the morphologic diagnosis of truncus arteriosus in infants.
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