Do optically recorded subclavian pulse curves help differentiate congenital subaortic stenosis from aortic stenosis?
Optically recorded subclavian pulse curves can aid in differentiating congenital subaortic stenosis from aortic stenosis based on the presence of a sharp incisura and a good aortic second sound.
Optically recorded subclavian pulse curves obtained with a simple cup-tambour system give graphic evidence of aortic valve mobility. Differentiation between congenital subaortic stenosis and aortic stenosis was aided by the demonstration in the former of a sharp incisura accompanied by a good aortic second sound; these two features were lacking or rudimentary in the latter. Despite marked auscultatory findings, there is usually little hemodynamic impairment in subaortic stenosis.
Brofman et al. (Mon,) studied this question.