Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded . There is significant cardiomegaly , unchanged . The left costophrenic angle is not well seen . There is no definite evidence of pleural effusion . No pneumothorax , pulmonary edema , or consolidation . Status post median sternotomy with intact sternotomy wires . A single lead pacer device is present , with the lead ending in the right ventricle .
    OUTPUT:
    
No acute cardiopulmonary process .