Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Moderate cardiomegaly and mediastinal contours are stable . Interstitial markings are chronicall abnormal , and do not necessarily indicate acute decompensation . Trace bilateral pleural effusions are similar to prior .
    OUTPUT:
    
Severe chronic cardiomegaly and chronic interstitial changes , not necessarily acute decompensation .