fig67

Figure 67. (A) Selected video frame from a subcostal four-chamber view (similar to Figure 66B) with color Doppler demonstrating turbulent flow (TF) in the pulmonary outflow tract. (B) Continuous wave Doppler recording across the pulmonary outflow tract demonstrates a peak Doppler velocity of approximately 5 m/s, suggesting significant obstruction. Reproduced from Ref.^[56]. MLV: Morphological left ventricle.