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Figure 4a. Pulmonary atresia with intact ventricular septum in a 1-day-old girl. (a) Horizontal long-axis cine image shows a dilated, noncontracting right ventricle (RV) and a dilated right atrium (RA). LA = left atrium, LV = left ventricle. (See also Movie 2 at radiographics.rsnajnls.org/cgi/content/full/27/1/5/DC1.) (b, c) Posterior VR (b) and coronal oblique subvolume MIP (c) MR angiographic images demonstrate that the pulmonary arteries (LPA, RPA) are hypoplastic, confluent, and supplied by a single collateral artery (CA) from the descending aorta (AO). LA = left atrium, * = pulmonary veins. A right ventricle–pulmonary artery conduit was planned, but the patient died before surgery could be performed.
