Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes remain low . There is persistent unchanged pulmonary edema . Cardiomegaly and a small left pleural effusion are again noted . Left upper chest wall pacemaker with pacer wires , LVAD device and Swan - Ganz catheter remain in appropriate position . Numerous EKG leads overlie the chest wall . Visualized bones are unremarkable .
    OUTPUT:
    
1 . Persistent , unchanged moderate pulmonary edema . 2 . Cardiomegaly . 3 . Left upper chest wall pacemaker , LVAD , Swan - Ganz catheter are in unchanged position compared to the earlier radiograph obtained at 02 :30 on the same day .