Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of biventricular pacemaker with leads in expected location . However , the relationship with the ventricular walls can not be appreciated in one view . Lung volumes are low , accentuating the cardiomediastinal silhouette and interstitial opacities . However , the heart is mildly enlarged . Mediastinal and hilar contours are unremarkable . There is no evidence for pulmonary edema , pulmonary consolidation , pleural effusion , or pneumothorax . Right - sided Port - A - Cath likely terminates in the low SVC .
    OUTPUT:
    
No pneumothorax . Status post biventricular pacemaker with the leads in expected location .