Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate mild - to - moderate cardiac enlargement , unchanged compared with prior . The lungs are clear . There is no pleural effusion or pneumothorax . The mediastinal contours appear normal . The pulmonary vasculature is mildy engorged .
    OUTPUT:
    
Mild - to - moderate cardiomegaly with borderline cardiac decompensation .