What radiographic findings are generally associated with moderate pulmonary venous hypertension? (PCWP = 20-30 mm Hg)

Increased vascular pressure prevents the lymphatics from effectively transporting fluid out of the interstitium, leading to an interstitial infiltrate and increased density on CXR.
Indistinct pulmonary vessel borders, hilar haziness or enlargement, and Kerley A and B lines may also be seen.