Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been exchange of the left chest pacemaker , now with two ventricular and a single atrial lead , which appear appropriately positioned . There is interval increase in now mild pulmonary edema , without pneumothorax . There is a new small right pleural effusion . The cardiac silhouette remains markedly enlarged , the mediastinal contours are notable for tortuosity of the aorta , with calcification of the aortic knob .
    OUTPUT:
    
1 . Interval pacemaker exchange , no evidence of pneumothorax . 2 . Mild pulmonary edema with marked cardiomegaly , slightly increased from ___ ___ , with new small left pleural effusion .