Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Dual - chamber pacemaker appears in standard position . Elevation of the right hemidiaphragm is chronic . No focal parenchymal consolidation of pleural effusion , pneumothorax . Mild right infrahilar atelectasis . Moderate cardiomegaly is stable .
    OUTPUT:
    
1 . Moderate cardiomegaly and persistently elevation of the right hemidiaphragm , however no evidence of pneumonia or heart failure .