Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Left chest wall dual - lead pacing device is again seen with tips in the right ventricle and coronary sinus . There is blunting of the posterior costophrenic angles compatible with small effusions as seen on prior . There is a hazy left basilar , retrocardiac opacity which was not clearly seen on most recent prior exam and could represent developing infection . Elsewhere , the lungs are clear . The cardiomediastinal silhouette was unchanged . No acute osseous abnormalities .
    OUTPUT:
    
Small persistent bilateral effusions . Subtle left basilar opacity which could represent infection in the proper clinical setting .