Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomegaly . Dual lead pacemaker in situ with the lead tips seen in the right atrium and right ventricle . No left - sided pneumothorax . No airspace consolidation . Spondylotic changes of the thoracic spine .
    OUTPUT:
    
Appropriate position of the dual lead pacemaker . No pneumothorax .