Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Atrial biventricular pacer defibrillator leads follow there expected courses from the left pectoral generator . The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . Mild cardiomegaly is unchanged .
    OUTPUT:
    
Atrial biventricular pacer defibrillator leads follow expected course from left pectoral generator . No pneumothorax .