Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . Marked cardiomegaly as before . Position of permanent pacer in left anterior axillary position connected to total of three electrodes terminating in right atrium , right ventricle and venous coronary sinus system in unchanged position . The pulmonary vasculature remains unchanged and shows moderate degree of perivascular haze , consistent with chronic congestion . Obliteration of left - sided diaphragmatic contour is suggestive of atelectasis in left lower lobe . The right - sided lateral pleural sinus is free from any fluid accumulation and there is no pneumothorax in the apical area . No evidence of new discrete pulmonary parenchymal infiltrates .
    OUTPUT:
    
Unchanged position of previously described permanent pacer system including the ICD device and biventricular electrodes . PA and lateral chest views for evaluation of elecrtrode positions as of ___ has apparently not changed as can be identified on this single view examination .