Video 6.3
Video 6.3: Subcostal sagittal view with color Doppler flow. There is flow acceleration into the right ventricular outflow tract from right ventricular muscle bundles. However, interrogating the gradient across this region may yield inaccurate measurements due to flow from a closely associated perimembranous ventricular septal defect. The two jets would have to be clearly differentiated in order to reliably interrogate the gradient across the right ventricular outflow tract.