Findings-CHF frequently presents radiologically with cardiomegaly and/or pleural effusions. The effusions may be bilateral. When unilateral, the right side predominates. The lung fields may be affected: early CHF results in upper zone redistribution; worsening CHF causes interstitial edema; further progression results in alveolar edema. The presence of Kerley lines are pathognomonic of interstitial infiltrates. This patient presents with typical Kerley B lines: thin horizontal lines stacking above the CP angle on frontal view.
http://eradiology.bidmc.harvard.edu/Classics/item.aspx?section=Cardiovascular&labelpk=edde29d6-1bd5-4bf2-a24a-e06762273d11&pk=37d788ef-9ce8-4890-a67d-5869a346b83b
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