Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs were obtained . A vagal stimulator is seen projecting over the left upper hemithorax . No focal consolidation , pleural effusion , pneumothorax , or pulmonary edema is seen . The heart is mildly enlarged . Mediastinal contours are normal . Healed right sided rib fractures are again visualized .
    OUTPUT:
    
Mild cardiomegaly , otherwise no radiographic evidence for acute cardiopulmonary process .