Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright chest radiograph is obtained . Midline sternotomy wires are noted . A PICC line again noted entering the left arm with tip residing in the region of the superior vena cava . The previously noted left apical pneumothorax is not clearly visualized and may have resolved in the interval . There is marked cardiomegaly with mild interstitial edema . Retrocardiac opacity is noted which could in part reflect an underpenetrated technique , though the possibility of effusion and consolidation is difficult to exclude . Bony structures appear grossly intact .
    OUTPUT:
    
Marked cardiomegaly with retrocardiac opacity which could in part reflect an underpenetrated technique , though consolidation and effusion can not be excluded on the basis of this exam . Interval resolution of left apical pneumothorax . Mild interstitial edema noted . Consider dedicated PA and lateral views to further assess .