Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . Marked cardiomegaly as before . Unchanged position of previously described permanent pacer in left anterior axillary position and dual intracavitary electrode pacing system with position in right atrial appendage and right ventricular apical portion . A third electrode is in typical coronary sinus position terminating in a location compatible with the obtuse marginal vein . The electrodes are in completely unchanged position in comparison with the previous study . The degree of cardiomegaly has not changed significantly , but noticeable is that the left cardiac border is now somewhat more separated from the left chest wall , which would suggest some improvement of the previously described marked cardiomegaly . Coinciding is a finding which favors this assumption in as much as the previously present upper zone vascular redistribution pattern in the pulmonary circulation has decreased , which would indicate a slightly lower left atrial filling pressure . There is no evidence of new pulmonary congestion , pleural effusion , or parenchymal infiltrates . No pneumothorax exists in the apical area .
    OUTPUT:
    
Radiographically mild degree of improvement with suggestion of slightly diminished cardiomegaly and lesser upper zone redistribution pattern . No evidence of acute infiltrates .