Description
Calculate time from a supplied ECG paper distance and speed.
Cardiology records distinguish event times, signal intervals, recording duration, paper calibration and Doppler angle conventions. A waveform distance requires a stated recording speed, and a signed projected velocity is not a diagnosis. Timing fractions and source labels do not establish cardiac function or appropriate care.
Calculate time from a supplied ECG paper distance and speed.
When to use this tool
Use ECG Paper Speed Distance Crosswalk when you already have distanceMillimeters, paperSpeedMillimetersPerSecond and need to calculate time from a supplied ECG paper distance and speed.
How to use the tool and how it works
- Enter distanceMillimeters, paperSpeedMillimetersPerSecond. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read durationSeconds, durationMilliseconds. Use the output convention below.
Require distanceMillimeters>=0 and paperSpeedMillimetersPerSecond>0; seconds=distance/speed, milliseconds=1000*distance/speed.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| distanceMillimeters | Distance Millimeters | Required. Finite number; minimum 0. |
| paperSpeedMillimetersPerSecond | Supplied positive recording speed in mm/s; no default paper speed. | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| durationSeconds | distanceMillimeters/paperSpeedMillimetersPerSecond. | Required. Finite number. |
| durationMilliseconds | Duration Milliseconds | Required. Finite number. |
{
"input": {
"distanceMillimeters": 10,
"paperSpeedMillimetersPerSecond": 25
},
"output": {
"durationSeconds": 0.4,
"durationMilliseconds": 400
}
}Limitations and assumptions
- Speed is supplied rather than selected from a standard setting. No waveform, interval, calibration, rhythm or clinical result is interpreted.
- 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
Review the original trace, acquisition settings, measurements and complete clinical context. Use the appropriate professional assessment for interpretation; local conversions and flags do not identify rhythms, assess disease or guide treatment.
References
Similar or alternative tools
- RR Interval Ms Seconds
Crosswalk a supplied positive RR interval between milliseconds and seconds.
- Cardiac Monitor Analyzable Time Share
Calculate supplied monitor time excluding recorded artifact time.