Korean J Clin Neurophysiol.  2014 Dec;16(2):49-54. 10.14253/kjcn.2014.16.2.49.

Assessing Methods of Heart Rate Variability

• Park KJ
• Jeong H

• KMID: 1737964
• DOI: http://doi.org/10.14253/kjcn.2014.16.2.49

Abstract

Heart rate variability is significantly associated with cardiovascular complications in various neurological disorders with cardiac impairment. Measures of spontaneous heart rate variability might be different from provocating tests of heart rate variability such as deep breathing and Valsava maneuver. Methods for analysis are divided into time domain methods and frequency domain methods. There are standard deviation of NN interval, standard deviation of average NN interval, root mean square of the successive differences, NN50, and pNN50 in time domain methods. Frequency domain bands can be divided into very low, low, and high frequency. Each variables are influenced by sympathetic and/or parasympathetic activity.

Keyword

Heart rate; Autonomic nervous system; Cardiovascular abnormalities

MeSH Terms

Autonomic Nervous System
Cardiovascular Abnormalities
Heart Rate*
Nervous System Diseases
Respiration

Figure

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  Figure 1. NN or RR interval in ECG.

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  Figure 2. Tachogram. Time series of RR interval in heart rate.

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  Figure 3. RR intervals in ECG. R1, R2 and R3 mean 1st R, 2nd R, and 3rd R, respectively. A, B, and C mean RR interval.

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  Figure 4. Spectral power of heart rate in normal person.

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