Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are fully expanded and clear without consolidations or suspicious pulmonary nodules . There is evidence for left atrial enlargement including supplying of the left mainstem bronchus and bulging of the cardiac silhouette posteriorly . Heart size is otherwise top - normal . No pulmonary vascular congestion , pulmonary edema , or pleural effusions . Dual chamber cardiac pacemaker leads terminate in the right atrium and right ventricle .
    OUTPUT:
    
No radiographic evidence of pneumonia or other acute cardiopulmonary abnormalities . Mild left atrial enlargement .