Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The vascular structures are engorged , although there is no overt pulmonary edema . There is no consolidation , pleural effusion or pneumothorax . The mediastinal contours are normal . The cardiac silhouette is mildly enlarged .
    OUTPUT:
    
1 . Mild enlargement of the cardiac silhouette . With the history of ongoing hypotension , consider cardiomyopathy or pericardial effusion as an etiology . 2 . No evidence of pneumonia .