- There is paucity of vascular markings in outer
third of lung fields
- In left to right shunts (ASD, VSD, PDA) and in
high output states, there is increased pulmonary flow, the vascular markings in the outer
third will be prominent.
- In interstitial disease, lymphangitic
malignant spread and in CHF with increased lymphatic flow the markings in
outer third will be prominent.