Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Newly placed left pacemaker is present , with leads in the regions of the right atrium and right ventricle , with no visible pneumothorax . Extensive fibrosis is present throughout the right lung with associated marked volume loss , with shift of mediastinum and heart to the right . Less extensive scarring or fibrosis is present within the left lung . No pleural effusion or acute skeletal finding .
    OUTPUT:
    
1 . Permanent pacemaker leads in expected location of right atrium and right ventricle with no pneumothorax . 2 . Asymmetrically distributed interstitial lung disease much worse on the right than the left . The patient carries a history of interstitial lung disease , and correlation with outside cross - sectional imaging would be helpful for a more complete characterization .