List five signs of aortic stenosis on CXR.

1. Valvular calcification on a lateral CXR or fluoroscopy (indicates severe disease)
2. Convex right upper cardiac border with a normal aortic knob (caused by post-stenotic dilation of the ascending aorta)
3. Left atrial enlargement
4. Left ventricular enlargement (seen in advanced disease)
5. Increased pulmonary vascularity or pulmonary edema (seen in advanced disease)