Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The appearance of the chest is unchanged since ___ . Mild cardiomegaly without evidence of pulmonary edema is unchanged . Retrocardiac atelectasis is similar . Dual - chamber pacing leads project over the expected position of the right atrium and right ventricle . No effusion or pneumothorax is present .
    OUTPUT:
    
No change since ___ .