10 second heart rate variability

The aim of this study was to investigate the use of 10 second measures of heart rate variability (HRV) as an alternative to measures derived from a 24 hr recording. Conventional 10s i2-lead ECGs were obtained together with 24 hr ECGs from 39 healthy volunteers and 41 patients who had recently suffered an MI. The Glasgow Program was used to derive SDNN and the average of the absolute difference between consecutive RR intervals (AAD). 24 hr ECG measures of HRV were derived from a commercially available system. The normal ranges for 10s SDNN and 10s AAD were similar but there were significant differences between healthy volunteers and MI patients (e.g. 46.65 ms v 18.74 ms for mean SDNN - p