Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since chest radiographs obtained 1 day prior , there is a new aortic valve replacement and a new right IJ central venous catheter that terminates within the superior SVC . There is no pneumothorax . Moderate cardiomegaly and bilateral lung hyperinflation are stable . There is biapical scarring and calcification of the aortic knob . Pacemaker leads that appear to terminate within the right atrium and right ventricle .
    OUTPUT:
    
Interval aortic valve replacement . A right IJ central venous catheter terminates within the superior SVC . No pneumothorax or other acute complications .