Fig. 7From: Study on the views and methods of ultrasonic screening and diagnosis for abnormal aortic arch in infantsCoarctation of the aorta on three-vessel and tracheal view. a Schematic drawing. b Ultrasound images. Aortic and pulmonary artery was proportion imbalanced and the internal diameter of aorta was reduced, showing asymmetric “V” sign. AO: aorta; PA: pulmonary artery; the internal diameter of aorta reduced as shown by↑Back to article page