Parasternal imaging of the right ventricular outflow tract. This composite image shows how well one can evaluate the infundibulum, valve tissue and proximal main pulmonary artery from the parasternal acoustic window. These images are taken from a mid to high parasternal window with the transducer “dot” almost straight leftward. The color Doppler portion of the composite reveals the lack of antegrade or retrograde flow across fairly thin valve tissue. Note that though there is membranous atresia, the valve sinuses are well formed and the annulus looks normal in size.

Download