<prompt> Pulmonary Plethora is seen in -TOFTAPVCCoATricuspid Atresia  <response>: Pulmonary plethora It is a term used to describe the appearances of increased pulmonary perfusion on chest radiographs. It may occur in several situations : Total anomalous pulmonary venous return TAPVC Left-to-right cardiac shunts e.g. ASD, VSD, PDA Truncus Aeriosus Vein of Galen Malformation Transposition of the Great Aeries It may also been seen in pregnancy due to increased cardiac output. 