Description
Convert heart period and a bounded symmetric period uncertainty to frequency bounds.
Cardiac recordings use sample indexes, time origins, event markers and observation windows. A sample-grid count, interval conversion or phase comparison operates on supplied records; it does not detect an actual heartbeat, validate an ECG or determine a clinical diagnosis.
Convert heart period and a bounded symmetric period uncertainty to frequency bounds.
When to use this tool
Use ECG Heart Period Frequency Crosswalk when checking the stated cardiac-record indexing, timing, phase or coverage convention.
How to use the tool and how it works
- Enter periodMs, periodUncertaintyMs. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read frequencyHz, beatsPerMinute, lowerBpm, upperBpm. Use the output convention below.
Convert heart period and a bounded symmetric period uncertainty to frequency bounds. Require periodMs > 0 and uncertainty in [0,period); Hz = 1000/period, bpm = 60000/period, lowerBpm uses period+uncertainty and upper uses period-uncertainty.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| periodMs | Period Ms | Required. Finite number; strictly above 0. |
| periodUncertaintyMs | Period Uncertainty Ms | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| frequencyHz | Frequency Hz | Required. Finite number. |
| beatsPerMinute | Beats Per Minute | Required. Finite number. |
| lowerBpm | 60000/(periodMs+periodUncertaintyMs), not a statistical confidence limit. | Required. Finite number. |
| upperBpm | Upper Bpm | Required. Finite number. |
{
"input": {
"periodMs": 1000,
"periodUncertaintyMs": 100
},
"output": {
"frequencyHz": 1,
"beatsPerMinute": 60,
"lowerBpm": 54.54545454545455,
"upperBpm": 66.66666666666667
}
}Limitations and assumptions
- Bounds are deterministic and asymmetric after inversion; no confidence level, measured rhythm or safe rate is determined.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Inspect the actual recording, acquisition settings and event annotations; use validated analysis and qualified clinical interpretation for patient-related decisions.
References
Similar or alternative tools
- ECG Qt RR Unit Consistency Term
Convert QT/RR quantities to seconds before taking a ratio.
- ECG Sample RR Interval Duration Factor
Return RR duration and reciprocal beat rate from two sample markers.