Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There persists an abandoned pacer lead from the right . A left pacer unit demonstrates leads in the right atrium and right ventricle . The heart size is markedly enlarged , but similar to prior study . The hilar contours demonstrate fullness of the vasculature and some there is indistinctness of the pulmonary vessels throughout the lungs , compatible with mild pulmonary edema . There is no large pleural effusion or pneumothorax . Minimal degenerative changes of the thoracic spine are seen .
    OUTPUT:
    
Cardiomegaly with mild pulmonary edema compatible with mild heart failure .