Understanding Ventricular Rate
The ventricular rate is the number of times the ventricles of the heart contract (or beat) per minute. It's a crucial indicator of cardiac function and health.
How it's Calculated:
The ventricular rate is typically determined by measuring the R-R interval on an electrocardiogram (ECG). The R-R interval is the time between two consecutive R waves on the ECG, which represents the duration of one cardiac cycle (from the start of one ventricular contraction to the start of the next). Since the ECG is a recording of electrical activity over time, we can use the R-R interval to calculate the rate per minute.
The formula used is:
Ventricular Rate (beats per minute) = 60 / R-R Interval (in seconds)
For example, if the R-R interval is measured to be 0.8 seconds, the ventricular rate would be:
Ventricular Rate = 60 / 0.8 = 75 beats per minute.
A normal resting heart rate for adults is typically between 60 and 100 beats per minute. Rates outside this range, whether too high (tachycardia) or too low (bradycardia), can indicate underlying medical conditions that require attention.
function calculateVentricularRate() {
var rrIntervalInput = document.getElementById("rrInterval");
var resultDiv = document.getElementById("result");
var rrInterval = parseFloat(rrIntervalInput.value);
if (isNaN(rrInterval) || rrInterval <= 0) {
resultDiv.innerHTML = "Please enter a valid R-R interval greater than zero.";
return;
}
var ventricularRate = 60 / rrInterval;
resultDiv.innerHTML = "Estimated Ventricular Rate: " + ventricularRate.toFixed(2) + " bpm";
}
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