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Western Journal of Nursing Research
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Measurement of Heart Rate Variability

Marie J. Cowan

Department of Physiological Nursing; School of Nursing, University of Washington, Seattle.

Heart rate variability (HRV) is a measure of autonomic nervous system balance/imbalance. Measurement and analysis of HRV can be classified into time domain analysis and frequency domain analysis. lime domain analysis is a general measure of autonomic nervous system balance and is based on altered versions of the measurement of the standard deviation of heart period, defined in terms of the sinus R-R intervals over time. There are six commonly used time domain measurements: SDANN, 24-hr SD, SD, RMSSD, RR50, and% RR50. Frequency domain analysis uses either autoregressive orfast Fourier transform techniques to delineate parasympathetic (high-frequency components) from sympathetic (low-frequency components) of autonomic control. This study explores the clinical applications of HRV with respect to respiratory sinus arrhythmia, exercise, mortality, sudden cardiac arrest, myocardial infarction, and congestive heart failure.

Western Journal of Nursing Research, Vol. 17, No. 1, 32-48 (1995)
DOI: 10.1177/019394599501700104
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