Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with prior radiographs on ___ , there is slight increase in vascular congestion and mild interstitial edema . There is no new focal consolidation or pneumothorax . Right pacemaker is unchanged in position with a lead terminating in the right ventricle . Replaced mitral valve is in place .
    OUTPUT:
    
Slight increase in vascular congestion and mild interstitial edema . Pacer lead is unchanged , terminating in the right ventricle .