Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a single - lead pacemaker device terminating in the right ventricle . The heart appears mild to moderately enlarged . The mediastinal and hilar contours appear unchanged including tortuosity and calcification of the aorta . The pulmonary arteries are prominent including upper zone redistribution and an indistinct character which suggests mild pulmonary vascular congestion . Streaky left basilar opacities suggest minor atelectasis . There is a non-displaced right posterolateral fractures involving the seventh and eighth ribs of uncertain acuity but not necessarily recent . In fact , the eighth appears to show some remodeling on the prior study .
    OUTPUT:
    
Findings suggesting mild pulmonary vascular congestion . Non-displaced right - sided rib fractures although not necessarily acute .