Ann Pediatr Card Close
 

Figure 16: The anatomic image (left hand panel), and the corresponding three-dimensional echocardiograms (right hand and middle panels), taken from different patients, show that fibrous continuity between the leaflets of the aortic and pulmonary valves, due to failure of formation of the muscular subpulmonary infundibulum, is the cardinal feature of defects opening to the outlet of the right ventricle, but are directly beneath the arterial roots. Such defects are doubly committed and juxta-arterial. In the defects shown, the postero-caudal limb of the septal band fuses with the ventriculo-infundibular fold so as to produce muscular discontinuity (star) between the leaflets of the aortic and tricuspid valves

Figure 16: The anatomic image (left hand panel), and the corresponding three-dimensional echocardiograms (right hand and middle panels), taken from different patients, show that fibrous continuity between the leaflets of the aortic and pulmonary valves, due to failure of formation of the muscular subpulmonary infundibulum, is the cardinal feature of defects opening to the outlet of the right ventricle, but are directly beneath the arterial roots. Such defects are doubly committed and juxta-arterial. In the defects shown, the postero-caudal limb of the septal band fuses with the ventriculo-infundibular fold so as to produce muscular discontinuity (star) between the leaflets of the aortic and tricuspid valves