Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Well - expanded lungs are clear . There are no pleural effusions or pneumothorax . The cardiomediastinal and hilar contours demonstrate stable severe cardiomegaly . Since the prior examination , there has been interval placement of a single lead AICD in standard position with tip terminating within the right ventricle . The pulmonary vascularity is not increased .
    OUTPUT:
    
1 . Single lead AICD in standard position with tip terminating within the right ventricle . No evidence of pneumothorax . 2 . Stable severe cardiomegaly .