Description
Classify a supplied cardiac phase into two halves.
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.
Classify a supplied cardiac phase into two halves.
When to use this tool
Use ECG Half Cycle Boundary Policy when checking the stated cardiac-record indexing, timing, phase or coverage convention.
How to use the tool and how it works
- Enter phaseFraction, boundaryToSecondHalf. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read half. Use the output convention below.
Classify a supplied cardiac phase into two halves. Require phaseFraction in [0,1); values below 0.5 are first half, above second, equality follows boundaryToSecondHalf.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| phaseFraction | Phase Fraction | Required. Finite number; minimum 0; strictly below 1. |
| boundaryToSecondHalf | Boundary To Second Half | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| half | Half | Required. Safe integer. |
{
"input": {
"phaseFraction": 0.5,
"boundaryToSecondHalf": true
},
"output": {
"half": 2
}
}Limitations and assumptions
- This is a caller-defined phase label, not actual systole/diastole detection or a physiological assessment.
- 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
- Cardiac Cycle Systolic Diastolic Share
Return residual diastolic time and cycle fractions.
- Cardiac Cycle Phase Offset
Return wrapped cycle phase and an ordinary reference-fraction gap.