Sandbox/00009

PCWP (mm Hg)	Phase of Pulmonary Congestion	Findings on Chest Radiograph
18–20	Onset of pulmonary congestion	Redistribution of pulmonary flow to the upper lobes ("cephalization") and Kerley lines
20–25	Moderate congestion	Diminished clarity of the borders of medium-sized pulmonary vessels ("perihilar haze")
25–30	Severe congestion	Radiolucent grapelike clusters surrounded by radiodense fluid ("periacinar rosette")
>30	Onset of pulmonary edema	Coalescence of periacinar rosettes resulting in "Bat's wing" opacities