Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart is moderately enlarged with left atrial enlargement . Lungs are clear and there is no pleural abnormality . Transvenous right atrial and left ventricular pacer leads and right ventricular pacer defibrillator leads are continuous from the left pectoral generator in follow their expected courses . Both hila are enlarged , right greater than left , due to pulmonary artery enlargement . No pneumothorax .
    OUTPUT:
    
No pneumothorax . Defibrillator in standard position .