Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pectoral AICD is unchanged with two leads terminating in the right atrium and right ventricle , as before . The cardiac silhouette remains severely enlarged , compatible with known dilated cardiomyopathy . The mediastinal and hilar contours are unchanged . The lungs are clear without focal consolidation concerning for pneumonia , pleural effusion , or pneumothorax . No pulmonary vascular congestion or edema is noted .
    OUTPUT:
    
Stable severe cardiomegaly , in keeping with history of dilated cardiomyopathy .