Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left pectoral pacemaker with leads ending in the right atrium and right ventricle . Normal heart size and hilar contours . Normal pleural surfaces . Unchanged dilatation of the thoracic aorta . Fully expanded , clear lungs . No pulmonary nodules .
    OUTPUT:
    
No acute cardiopulmonary process .