Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is again noted . The mediastinal silhouette and pulmonary vasculature are unremarkable . Again seen is a left - sided pacemaker with the single lead terminating in the right ventricle . The lungs are clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic process .