Characteristic X-ray finding in ASD is

* Description:can be normal in early stages when the ASD is small * signs of increased pulmonary flow (pulmonary plethora or shunt vascularity) o enlarged pulmonary vessels o upper zone vascular prominence o vessels visible to the periphery of the film o eventual signs of pulmonary aerial hypeension * chamber enlargement o right atrium o right ventricle o note: left atrium is normal in size unlike VSD or PDA o note: aoic arch is small to normal