Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a biventricular pacemaker with hardware projecting over the left upper outer chest and pacing leads projecting over the expected locations of the right and left ventricles . No pneumothorax is detected . Cardiomegaly persists . No pulmonary edema is evident . Aortic calcification is noted .
    OUTPUT:
    
Interval placement of biventricular pacemaker with leads projecting over the expected locations of the right and left ventricles .