Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiograph . No overt edema but mild interstitial edema is difficult to exclude . Severe cardiomegaly is unchanged . There are no pleural effusions or pneumothorax . Left chest wall pacemaker with lead in the right ventricle is unchanged . Bony structures are intact .
    OUTPUT:
    
Stable marked cardiomegaly . No overt pulmonary edema but mild interstitial edema is difficult to exclude .