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 from changes in RR intervals in a continuous recording of electrocardiogram. Different types of measurements are carried out on these RR intervals in time and frequency domain. Among others, variance, total power, low-frequency (LF) power, high-frequency (HF) power, and LF/HF ratio are frequently used HRV parameters for objective assessment of autonomic function and assessment of several clinical conditions. Poincare plot gives a quick visual impression of HRV. This article describes measurement of all these parameters and their clinical applications.

Keywords: Autonomic nervous system, Diabetic neuropathy, Heart rate variability, Poincare plot, Sympathovagal balance, Total power.

How to cite this article: Jindal GD, Sawant MS, Pande JA, Rohini A, Jadhwar P, Naik BB, Deshpande AK. Heart Rate Variability: Objective Assessment of Autonomic Nervous System. MGM J Med Sci 2016;3(4):198-205.

Source of support: Nil

Conflict of interest: None