Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no new consolidation . The lungs are clear . Moderate cardiomegaly is unchanged in this patient with prior sternotomy and mitral valve repair . Atrioventricular pacemaker is in adequate position . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
There is no significant change since ___ . There is no evidence of pneumonia .