<prompt> A chest X-ray shows plethoric lung fields which are seen in all of the following conditions, EXCEPT:Atrial septal defect ASDTAPVC Total Anomalous Pulmonary venous connectionEbsteins anomalyVentricular septal defect  <response>: Intracardiac shunts that result in increased pulmonary aerial flow can enlarge the pulmonary vascular system giving the lung fields a plethoric appearance. The most common lesions causing increased vascularity without cyanosis are, Atrial septal defect ASD Ventricular septal defect VSD Patent ductus aeriosus PDA The main cardiac lesions with cyanosis and increased pulmonary vascularity are, Transposition of the great vessels Truncus aeriosus Total anomalous pulmonary venous connection TAPVC Ref: Ravenel J.G. 2011. Chapter 3. Imaging of the Hea and Great Vessels. In M.Y. Chen, T.L. Pope, D.J. Ott Eds, Basic Radiology, 2e. 