Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a biventricular pacer / ICD with leads terminating in the coronary sinus and right ventricle . The right atrial lead takes an unusual course , directed posteriorly . While this appears unchanged from the prior study on the frontal view , an aberrant location should be considered . There is no evidence of lead fracture or displacement . Aortic valve prosthesis is again noted . Sternotomy wires and mediastinal clips are present . Moderate cardiomegaly is unchanged . There has been further improvement in the mild pulmonary edema . Further aeration of the left lung base is consistent with resolving atelectasis and pleural effusions . There is no pneumothorax .
    OUTPUT:
    
Lead intended for the right atrium is directed unusually posteriorly . While this lead is likely in the right atrium , correlation with electrophysiology measurements would be helpful . These findings were discussed with Dr . ___ by Dr . ___ at 10 :50 AM on ___ by telephone ___ minutes after discovery .