Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left pectoral atrioventricular pacer - defibrillator is in adequate position . There is no complication , no pneumothorax or pleural effusion . Mild cardiomegaly is unchanged . Mediastinal contour is stable .
    OUTPUT:
    
Atrioventricular pacemaker is in adequate position without complication .