Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the chest radiograph obtained 1 day prior , a small subpulmonic effusion has minimally increased . Mild pulmonary vascular congestion has decreased . Severe cardiomegaly is unchanged . No pulmonary edema . Lungs are fully expanded and clear without focal consolidation . Dual - chamber pacemaker leads are unchanged and appropriately positioned .
    OUTPUT:
    
Improved pulmonary vascular congestion , but minimally increased , small , right subpulmonic effusion .