Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . An AICD is unchanged with lead extending into the expected level of the right ventricle . The heart appears intervally enlarged which given the short interval raises concern for pericardial effusion . Correlation with echo is advised . Lungs are clear without focal consolidation , effusion , or pneumothorax . No signs of pulmonary edema . Mediastinal contour appears normal . Hilar configuration is normal . Bony structures intact .
    OUTPUT:
    
Interval enlargement of the cardiac silhouette which given the short interval is concerning for development of a pericardial effusion . Correlate with echocardiogram .