Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided implanted cardiac device projects a single lead into the right ventricle . The heart is moderately enlarged , unchanged in size since ___ radiograph examination . There is mild to moderate central pulmonary vascular congestion but no edema . There is no pneumothorax or pleural effusion . No focal consolidations are seen . Multiple intact sternal wires are unchanged in position .
    OUTPUT:
    
Moderate cardiomegaly is unchanged since ___ . Mild to moderate pulmonary vascular congestion but no edema .