Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low with atelectasis at the lung bases . . Cardiomegaly is unchanged . Cardiac conduction device is noted with partially visualized leads . There is mild prominence of the pulmonary vasculature without pulmonary edema .
    OUTPUT:
    
Assessment of the left lung base is limited . No acute cardiopulmonary abnormality .