What is the likely cause of ascending aortic dilatation in this case?
What are the imaging findings of aortic stenosis?
Stenosis results in increased cardiac after-load and a high velocity jet through the aortic valve. Before onset of cardiac failure chest x-ray maybe entirely normal or may demonstrate mild cardiac enlargement with dilatation of the ascending aorta (post stenotic dilatation).
CTA of the thorax confirms enlargement of the ascending aorta with a normal caliber descending aorta. Non-contrast CT image depicts aortic valve calcification.