This calculator helps you estimate your heart rate from an Electrocardiogram (ECG) strip, especially when the rhythm is irregular. An ECG measures the electrical activity of your heart, and the speed at which this activity occurs dictates your heart rate. For regular rhythms, calculating heart rate is straightforward. However, for irregular rhythms, you need to use a method that accounts for the variation between heartbeats.
function calculateIrregularHeartRate() {
var stripLength = parseFloat(document.getElementById("ecgStripLength").value);
var qrsComplexes = parseFloat(document.getElementById("numberOfQRSComplexes").value);
var resultElement = document.getElementById("result");
resultElement.innerHTML = ""; // Clear previous results
if (isNaN(stripLength) || isNaN(qrsComplexes) || stripLength <= 0 || qrsComplexes < 0) {
resultElement.innerHTML = "Please enter valid numbers for ECG strip length and number of QRS complexes.";
return;
}
// For irregular rhythms, the most common method is to count the number of QRS complexes
// in a given strip length and multiply to get beats per minute (bpm).
// Heart Rate (bpm) = (Number of QRS Complexes / ECG Strip Length in seconds) * 60 seconds/minute
var irregularHeartRate = (qrsComplexes / stripLength) * 60;
resultElement.innerHTML = "Estimated Irregular Heart Rate: " + irregularHeartRate.toFixed(2) + " bpm";
}
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