Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual - chamber pacemaker / AICD device is noted with leads terminating in te right atrium and right ventricle . Heart size is mildly enlarged . Aortic knob is calcified . Mediastinal and hilar contours are otherwise unremarkable , and there is no pulmonary edema . Streaky opacities in both lung bases likely reflect areas of atelectasis . No pleural effusion or focal consolidation is present . There is no pneumothorax . No acute osseous abnormalities seen .
    OUTPUT:
    
No evidence of congestive heart failure . Mild bibasilar atelectasis .