Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs . The heart is markedly enlarged . Median sternotomy wires are intact . There are increased insterstitial markings as well as a focal confluent opacity in the right lower lung , which may represent CHF with alveolar edema . However , there is no pleural effusion . No pneumothorax detected .
    OUTPUT:
    
Patchy interstitial and some more confluent opacities , worst at the right base , without effusions . Given the presence of severe cardiomegaly , this could represent somewhat assymetric CHF , with an element of pulmonary edema . However , focal confluent opacity in the right lower lung makes a superimposed infection difficult to exclude .