Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a dual - lead pacemaker device with leads terminating in the right atrium and ventricle , respectively . The heart is normal in size . The mediastinal and hilar contours appear unchanged . There is upper zone redistribution of pulmonary vascularity , suggesting pulmonary venous hypertension without frank congestive heart failure . Otherwise , the lungs appear clear . There are no definite pleural effusions or pneumothorax .
    OUTPUT:
    
Findings suggesting minimal congestion , otherwise unremarkable .