Stage II - Interstitial edema Stage II of CHF is characterized by fluid leakage into the interlobular and peribronchial interstitium as a result of the increased pressure in the capillaries. When fluid leaks into the peripheral interlobular septa it is seen as Kerley B or septal lines. Kerley-B lines are seen as peripheral short 1-2 cm horizontal lines near the costophrenic angles. These lines run perpendicular to the pleura. #Clinical #Radiology #CXR #CHF #KerleyB #Kerley #BLines #IntersitialEdema #Intersitial #Edema #RadiologyAssistant
