如何在 JavaScript 中将 RR (IBI) 数据转换为心率

Question

在做了一些研究之后，我决定在这里寻求建议，因为我不确定如何处理。

问题：

我有一组 RR (IBI) 数据

示例：[679, 686, 650...]

如何将其转换为心率？

我的研究：

• http://www.meddean.luc.edu/lumen/meded/medicine/skills/ekg/les1prnt.htm
• github上的Vairous库，但在JS上没有，或者我可以移植到JS的方式
-

我的方法当然是有缺陷的：

for (const ibiInMilliseconds of eventJSONObject.DeviceLog["R-R"].Data) {
ibiBuffer.push(ibiInMilliseconds);
const ibiBufferTotal = ibiBuffer.reduce((a, b) => a + b, 0);
// If adding the ibi to the start of the activity is greater or equal to 2.5 second then empty the buffer there
if ((lastDate.getTime() + ibiBufferTotal) >= lastDate.getTime() + 2500) {
const average = ibiBuffer.reduce((total, ibi) => {
return total + ibi;
}) / ibiBuffer.length;
const avg = 1000 * 60 / average; 
// I save this avg to a 1s list but it's very error prone

ibiBuffer = [];
lastDate = new Date(lastDate.getTime() + ibiBufferTotal);
}
}

我将不胜感激任何帮助或指示在哪里寻找。

Answer 1

我认为它实际上更容易：

const hearbeats = [];
let beatCount = 0;
let time = 0;
for(const ibi of ibis){
time += ibi;
beatCount++;
if(time > 60 * 1000){
hearbeats.push(beatCount);
beatCount = time = 0;
}
}

(免责声明：我不知道我在说什么)

Answer 2

到目前为止，从我从 @jonas W 采用的修复时间和转换为 bpm(心率)的情况来看

/**
* Returns an Map of elapsed time and HR from RR data
* @param rr
* @param {number} sampleRateInSeconds
* @return {number[]}
*/
private static getHRFromRR(rr, sampleRateInSeconds?: number, smoothByAvg?: boolean): Map<number, number> {
sampleRateInSeconds = sampleRateInSeconds || 10; // Use any second number
const limit = sampleRateInSeconds * 1000;
let totalTime = 0;
let rrBuffer = [];
return rr.reduce((hr, d) => {
// add it to the buffer
rrBuffer.push(d);
// Increase total time
totalTime += d;
// Check if buffer is full
const time = rrBuffer.reduce((a, b) => a + b, 0); // gets the sum of the buffer [300+600 etc]
if (time >= limit) {
if (smoothByAvg) {
// @todo implement
} else {
hr.set(totalTime, rrBuffer.length * 60 / (time / 1000)); // convert to bpm
}
rrBuffer = [];
}
return hr;
}, new Map());
}

Answer 3

经过大量时间的测试等，正确答案是：

/** 
* Converts the RR array to HR instantaneus (what user sees) 
* @param rrData 
* @return {any} 
*/ 
public static convertRRtoHR(rrData): Map<number, number> { 
let totalTime = 0; 
return rrData.reduce((hrDataMap: Map<number, number>, rr) => { 
totalTime += rr; 
hrDataMap.set(totalTime, Math.round(60000 / rr)); 
return hrDataMap; 
}, new Map()); 
}