Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and upright images of the chest demonstrate a pacemaker in the left anterior axillary position with intact leads along the expected course to the right atrium and right ventricles . There is no pneumothorax or other indication of complications related to pacer lead placement . Mild cardiomegaly is seen . The lungs are clear with resolved vascular congestion . There are degenerative changes in the thoracic spine .
    OUTPUT:
    
Pacer leads in appropriate position in the right atrium and right ventricle , resolved pulmonary vascular congestion .