Fig. 13From: A new classification of congenital abnormalities of UPVS: sonographic appearances, screening strategy and clinical significanceHigh-definition power flow Doppler image, 3D high-definition power flow Doppler image and grayscale ultrasound image show unilateral shunt between the LPV and the LHV with the DV presence (a, b) and absence (c, d)Back to article page