An approximation of stenotic aortic valve area by phonomechanocardiographic method: the comparative study of noninvasive methods.

Phonomechanocardiographic and ultrasonocardiographic parameters were compared in the multiplex manner in order to assess a degree of narrowing of the stenotic aortic valve areas. Adult patients with aortic valve stenosis were included in the study. The main condition for admission in the research sample was that the mean rate of circumferential fibre shortening be greater than 1 s-1 i.