Heart Rate Variability: for real doctors. Regulation in the disease. Some pathological conditions. Approach at heart rhythm disorder. Heart rate variability. Atrial fibrillation and flutter. Space-time and spectral characteristics of HRV

Yabluchansky N.I., Martynenko A.V.

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

There is a higher degree of stability of the space-time and spectral characteristics of HRV in AF than in the sinus rhythm.
Regardless of the basal HR, the coefficient of variation (var) of the average over 5-minute intervals of the cardiac cycle length does not exceed 0.05 for AF and 0.07 for sinus rhythm.
In the case of the AF, the characteristics with high stability are sdRR, pNN50 with a coefficient of variation of 0.09 and 0.03, respectively, intermediate – BCPI (var 0.14), TP BCP (var 0.14), power VLF ( var 0,2) and HF (var 0,13) and low – power LF (var 0,23).
In the case of a sinus rhythm, indicators with high stability, except for mRR, are not present; the intermediate degree stability includes BCPI (var 0.19) and low degree stability includes sdRR (var 0.4), pNN50% (var 0.23) and spectral characteristics: TP BCP (var 0.34), power HF (var 0.34), LF (var 0.38) and VLF (var 0.4).

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