Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest were reviewed , and compared to the prior study . The patient is status post CABG and aortic valve replacement . Median sternotomy wires , clips along the left mediastinum , abandomned epicardial pacer leads and a prosthetic aortic valve are new compared to the prior study . There is a moderate - sized left pleural effusion and left lower lung atelectasis . No vascular congestion or pneumothorax . Unchanged cardiomegaly .
    OUTPUT:
    
Moderate right - sided pleural effusion . No pneumothorax .