Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly is stable . Transvenous pacemaker leads terminate in a standard position in the right atrium , right ventricle and through the coronary sinus . The lungs are clear . There is no pneumothorax or pleural effusion . .
    OUTPUT:
    
No pneumothorax . Normal positioned pacer leads