Question

How ankylosing spondylitis cause aortic regurgitation?

Answer 1

Aortic disease and aortic regurgitation may, however, predate the onset of any joint symptoms, and the presence of ankylosing spondylitis as an underlying cause may not be initially appreciated [1]. ... Other irregularities were aortic root thickening, increased root stiffness and dilatation
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Answer 2

Answer:

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Explanation:

Extension of the fibrous scar into ventricular septum may cause heart block. The distinctive cardiovascular morphologic findings in patients with ankylosing spondylitis clearly separate this condition from syphilis and other entities associated with aortic regurgitation.