Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Single lead pacemaker is again noted which appears in unchanged position though the distal extent is not clearly visualized . The heart remains moderately enlarged . There is no focal consolidation , large effusion or pneumothorax . No pulmonary edema . Mediastinal contour is stable . Bony structures are intact .
    OUTPUT:
    
Stable cardiomegaly . No edema or signs of pneumonia .