Pediatric Heart Rate Variability Normative Values Related to Average Heart Rate and Age in a Developing Country

Cardiac autonomic function can evaluate with Heart Rate Variability (HRV) which is a noninvasive diagnostic method using mathematical algorithms [1]. In the past, many studies have been used to obtain information about the variability of the heart rate [2- 5].

Abbreviations:HRV: Heart rate variability; ANS: Autonomic nervous system changes; HF: High frequency; LF: Low frequency: MRR: Mean RRI; PNN50: Percentage of consecutive normal RRI differing more than 50 ms; RMSSD: Root mean square of successive differences; SDNN: Standard deviation of normal-to-normal RR intervals; SD1: Standard deviation measuring the dispersion of points in the Poincare plot of RR intervals across the identity line; SD2: Standard deviation measuring the dispersion of points in the Poincare plots of RR intervals along the identity line; CL: The contribution of the long-term HRV to the total HRV that is a percentage of the long-term variance (SD22) of RR intervals to doubled total variance of RR intervals (SDNN2)