Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate cardiomegaly is stable . Transvenous pacemaker leads terminate in a standard positions in the right atrium , right ventricle and through the coronary sinus . Patient is status post CABG . The lungs are clear . There is no pneumothorax or pleural effusion . Sternal wires are aligned , breakage of the fourth sternal cerclage wire from the top is again noted .
    OUTPUT:
    
No acute cardiopulmonary abnormalities . No evidence of pneumothorax .