Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lead positions of the dual - chamber pacemaker is unchanged compared to the prior exam . There is moderate cardiomegaly . The lungs demonstrate moderate pulmonary edema but no evidence of pleural effusions or pneumothorax . Mild atelectatic changes at the lung bases are unchanged . Incidental note is made of chronic stable calcified scarring in the left apex . There are no new parenchymal opacities . There is no evidence of pneumothorax .
    OUTPUT:
    
Unchanged lead positions from recently inserted dual - chamber pacemaker .