Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe cardiomegaly with slight increase in size compared to ___ . Hilar contours are unremarkable . A left anterior chest wall single - lead pacer is unchanged in position . No focal consolidation worrisome for pneumonia ; however , left lung base is difficult to assess . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
1 . No acute intrathoracic process . No frank interstitial edema . 2 . Severe global cardiomegaly slightly increased in size from prior examination . This could be due to pericardial effusion ; however , no definite fat pad sign is seen . Conventional lateral view may be helpful to assess the left lung base .