Heart rate variability: for real doctors. Translation from the Russian version of the book, published at Kharkiv, 2010, 131 p.
The basics and practice of the clinical use of the technology of heart rate variability are outlined for doctors of all specialties and students of medical faculties of universities.
9. Regulation in the disease
Approach at heart rhythm disorder
Atrial fibrillation and flutter. The total power of the HRV spectrum in people with persistent and permanent AF is an order of magnitude or higher than that of individuals with sinus rhythm with a wide range of variation of HRVR (from 2649 ms2 to 47596 ms2) against individuals with sinus rhythm (from 172 ms2 to 2142 ms2).
A low level of fluctuations characterizes the contribution of the power components to the total power of the HRV spectrum. If patients with AF have a predominant HF power of about 56% of the total power of the HRV spectrum, and the VLF power is about 15%, then in patients with sinus rhythm the prevailing VLF power is about 63% of the total HRV power, is about 15%. The contribution of LF power in patients with AF and sinus rhythm differs slightly and is about 29% and 22%, respectively.
A wide range of fluctuations in the overall power of the spectrum of HRV in AF is the result of varying degrees of preservation of vegetative regulation and sinus activity. The fact that, following the data obtained with significant fluctuations in the power of the HRV spectrum from patient to patient with AF, the structure of a particular patient is rigid, it contains much-hidden information that needs decoding.