Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study , degree of distension of the esophagus may be somewhat less . Marked cardiomegaly is similar to the prior film . Increased retrocardiac density is also similar , though the left hemi diaphragm is very faintly visible on the current film . Again seen is upper zone redistribution and mild diffuse vascular blurring , consistent with CHF . On the right , there is some increased perihilar density , possibly an artifact of the cardiomegaly or esophageal distension -- otherwise , no focal consolidation on the right and no gross effusion . The pacemaker device and its leads are similar to the prior study . Slight difference in configuration of the right atrial lead is likely accounted for by differences in the patient rotation . On the current study , the left mainstem bronchus appears smaller in caliber than on the right , unchanged compared with the prior film . Again noted are multiple clips overlying the right upper abdomen .
    OUTPUT:
    
1 . Left lower lobe collapse and / or consolidation , possibly slightly improved . The possibility of a pneumonic infiltrate in the left lower lobe can not be excluded . 2 . Marked cardiomegaly and mild CHF . 3 . Pacemakers and leads probably unchanged -- please see comment above . 4 . Degree of distention of the esophagus appears less . 5 . Apparent smaller caliber of the left mainstem bronchus compared to the right , unchanged .