Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Redemonstrated is the unchanged position of a dual - chamber subclavian pacemaker seen in place , with leads identified within the right atrium and right ventricle . Note that the prior report mistakenly described the pacemaker lead to be within the left atrium . There is stable moderate cardiomegaly . Mild bilateral pulmonary edema is noted . There is no focal consolidation , pneumothorax , or pleural effusion seen . The mediastinal contours are grossly normal . No bony abnormalities are detected .
    OUTPUT:
    
Unchanged position of a dual - chamber pacemaker with leads in the right atrium and right ventricle . No evidence of associated pneumothorax . Moderate cardiomegaly .