Left parasternal cranial long-axis view of the right ventricular outflow tract. The left ventricle and aorta are observed. The transversa view of the aortic valve is recognized as a thin echoic line. Ds, dorsal; Vt, ventral; RV, right ventricle; RA, right atrium; TV, tricuspid valve; Ao, aorta; PA, pulmonary artery; PV, pulmonary valve.