Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Median sternotomy sutures and a mitral valve prosthesis , unchanged in appearance compared to the prior study . Moderate cardiomegaly and pulmonary edema are similar in degree when compared to the prior study . Probable right pleural effusion . No pneumothorax seen .
    OUTPUT:
    
No significant interval change when compared to the prior study .