Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear . The cardiomediastinal and hilar contours are unchanged . The heart remains enlarged which may reflect cardiomegaly or pericardial effusion . A single lead pacemaker is present . No pneumothorax , pleural effusion , consolidation , or evidence of pulmonary edema .
    OUTPUT:
    
No acute cardiopulmonary process .