Heart rate variability (HRV) came into existence by observations of Hon and Lee in 1965
and since then has been a subject of prime importance in medical research. It is derived …

Both heart rate variability (HRV) and pulse rate variability (PRV) are noninvasive means for
the assessment of autonomic nervous control of the heart. However, it is not settled whether …

Many studies have been conducted on heart rate variability. Variability in the heart signal of
two sequential beats is called heart rate variability (HRV). Short-and long-term variability …

Heart rate variability (HRV), a non-invasive index of autonomic controls of the heart, has
extensively been employed in various fields of study. The application range of this index …

The study of heart rate variability (HRV) provides a mean for observing the heart's ability to
respond to normal regulatory signals that affect its rhythm. The HRV analysis has proven …

Pathologic conditions are frequently associated with marked changes in heart rate (HR),
which itself influences its variability (HRV). Accordingly, some researchers consider the HR …

Heart rate variability (HRV) is a reliable reflection of the many physiological factors
modulating the normal rhythm of the heart. In fact, they provide a powerful means of …

Power spectral analysis of heart rate variability (HRV) provides a non-invasive method of
estimating cardiac autonomic nerve activity. It has been reported that HRV decreases with …

The article discusses method for interpreting heart rate variability (HRV). HRV reflects
change in neurohormonal activation which is an important pathophysiologic factor in …

Heart rate variability (HRV) refers to beat-to-beat interval changes on the electrocardiogram
(ECG) and is considered a noninvasive measure of the autonomic balance. Although …