[Evaluation of the vascular wall by the spectra of Korotkov's tones].

A method has been proposed for the registration and frequency analysis of Korotkov's tones. For interpretation of spectra, the authors accept the theory which interprets the tones as an acoustic result of hydrodynamic flutter in the partially ligated arterial portion. A unit based on a multifunctional recorder with variable frequency characteristics, an analog-to-digital converter, and a computer is used to record the tones. Computer-assisted Fourier analysis of tones is made. Three basic types of frequency spectra for brachial artery have been obtained in patients of different age. The signs used to evaluate the vascular wall at different stages of development of vascular pathology have been established.