Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Heart size is mildly enlarged , which accounting for differences in rotation is likely unchanged compared to the prior study . The aorta is diffusely calcified . Mediastinal and hilar contours are unremarkable . Mild pulmonary vascular congestion is present without frank pulmonary edema . Small bilateral pleural effusions are visualized along with minimal atelectasis in the lung bases . No focal consolidation or pneumothorax is seen . Left shoulder arthroplasty is incompletely imaged . There are multilevel mild to moderate degenerative changes noted in the thoracic spine .
    OUTPUT:
    
Mild pulmonary vascular congestion and small bilateral pleural effusions .