Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chronic interstitial fibrosis is severe . Left - sided transvenous pacer has leads ending in the right atrium and right ventricle . There is no focal consolidation concerning for pneumonia . No pleural effusion or pneumothorax is seen . The heart is mildly enlarged . The mediastinal and hilar contours are normal .
    OUTPUT:
    
Chronic interstitial fibrosis . No evidence of pneumonia . No acute cardiopulmonary process .