Table 1.
A summary of the HRV feature characteristics used in this work.
| Feature | Domain | Description |
|---|---|---|
| R-R interval | Time | Times between each successive heartbeat, measured from one normal or abnormal R peak/QRS to the next in milliseconds. |
| rMSSD | Time | Square root of the mean of the sum of the squares between adjacent R-R intervals. |
| SDRR | Time | Standard deviation of R-R intervals in milliseconds. |
| meanRR | Time | Average value of the R-R interval in milliseconds. |
| CVRR | Time | Coefficient of variation in R-R intervals. |
| CVSD | Time | Coefficient of variation between successive R-R interval differences. |
| medianRR | Time | Median value in R-R intervals in milliseconds. |
| madRR | Time | Median value of R-R interval deviation in milliseconds. |
| mcvRR | Time | Median value of the coefficient of variation. |
| RR20 | Time | Number of pairs of adjacent R-R intervals differing by more than 20 milliseconds. |
| pRR20 | Time | Count of RR20 over a total number of R-R intervals. |
| RR50 | Time | Number of pairs of adjacent R-R intervals differing by more than 50 milliseconds. |
| pRR50 | Time | Count of RR50 over the total number of R-R intervals. |