Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is markedly enlarged , stable since prior examination . The pulmonary vasculature is minimally indistinct . There has been interval removal of the Swan - ___ catheter . No pleural effusion or pneumothorax identified .
    OUTPUT:
    
Persistent marked cardiomegaly without evidence of pulmonary edema .