Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single - lead pacemaker terminates in the right ventricle where it makes a single loop . The heart appears mildly enlarged . The aorta is calcified , particularly along the arch . There is no definite pleural effusion or pneumothorax . The chest is hyperinflated . There is upper zone redistribution of pulmonary vasculature . The vasculature is perhaps slightly indistinct , particularly in the right upper lung , where it is somewhat more prominent than the left . Still , despite asymmetry , this appearance is suggestive of mild pulmonary vascular congestion and includes widespread bronchial cuffing , again somewhat more prominent in the right lung than left . A mild lower thoracic compression deformity with anterior wedging appears likely chronic .
    OUTPUT:
    
Interstitial abnormality suggesting mild vascular congestion ; although perhaps less likely , particularly noting some asymmetry , widespread inflammatory process involving the airways could be considered as an alternative for coinciding etiology .