Heart Rate Variability: Frequency Domain (Task Force 1996)
Heart rate variability in the frequency domain from RR intervals: LF, HF and LF/HF by the 1996 Task Force bands.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Recording type
- Short-term (minutes)
- RR intervals in ms, one per line
- 1000, 1068, 1024, 978, 1022, 1048, 969, 922, 974, 1032, 998, 968, 1029, 1078, 1007, 949, 987, 1021, 966, 933, 997, 1067, 1026, 978, 1020, 1049, 972, 921, 972, 1032, 1000, 968, 1026, 1079, 1010, 949, 985, 1021, 968, 933, 995, 1066, 1028, 978, 1018, 1049, 975, 921, 970, 1031, 1001, 967, 1024, 1079, 1013, 949, 983, 1021, 970, 932, 992, 1066, 1030, 978, 1017, 1050, 978, 921, 967, 1031, 1003, 967, 1022, 1079, 1016, 949, 981, 1022, 972, 932, 990, 1065, 1032, 979, 1015, 1050, 980, 921, 965, 1030, 1005, 967, 1019, 1079, 1019, 950, 980, 1022, 974, 932, 987, 1064, 1035, 979, 1013, 1051, 983, 922, 963, 1029, 1007, 967, 1017, 1078, 1022, 950, 978, 1022, 977, 932, 984, 1063, 1037, 979, 1011, 1051, 986, 922, 961, 1028, 1008, 967, 1015, 1078, 1024, 951, 976, 1021, 979, 931, 982, 1062, 1039, 980, 1010, 1051, 989, 922, 959, 1027, 1010
Result: LF 450.9 ms², HF 1216 ms², LF/HF 0.3708 over 2.497 minutes.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Recording type
- RR intervals in ms, one per line
How this is calculated
Citation
Task Force of the ESC and NASPE. Heart rate variability: standards of measurement, physiological interpretation and clinical use. Circulation 1996;93:1043-1065, Table 2 (frequency-domain measures and bands). Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.