Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were compared to previous exam from ___ and CT from ___ . The lungs are clear , were not obscured by overlying cardiac pacing device . There is blunting of the left posterior costophrenic angle compatible with Bochdalek hernia identified on prior CT . Cardiac silhouette is enlarged but stable . Dual - lead pacing device lead tips again seen in the right ventricular apex and right atrium . Degenerative changes noted at the right glenohumeral and acromioclavicular joints . Mild compression deformity again seen in the lower thoracic vertebral body .
    OUTPUT:
    
Cardiomegaly . No definite acute cardiopulmonary process or evidence of failure .