Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable upright AP chest radiograph was obtained . The lungs are well inflated and clear . No effusion or pneumothorax is present . Two right ventricular , one right atrial and one left coronary vein leads are noted . A pacemaker generator in the left chest is visible and has been exchanged since ___ . Three disconnected leads are visible in the left chest . The patient is status post CABG and median sternotomy . No pulmonary vascular congestion .
    OUTPUT:
    
Pacemaker generator exchange , stable intracardiac lead positions . No acute cardiopulmonary abnormality .