![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPtELs-d9Az8TeTY0ngkquN3SGhfERCVTh40_X47SCOjv0wUekcvd-9BorhNej3_myPV7HkB2pY-SUj3DhGnS8d1FjiU1HjuZHCYc7P9JCOjNtS6YUHiJGbDIAJNHRB-UN4A0rU2jHTv-C/s320/CHF%2520with%2520upper%2520zone%2520redistribution%2520labeled.jpg)
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.This patient presents with upper zone redistribution.
http://eradiology.bidmc.harvard.edu/Classics/item.aspx?section=Cardiovascular&labelpk=edde29d6-1bd5-4bf2-a24a-e06762273d11&pk=963d5ea7-619f-42d6-a99c-b57828f773de
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