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Corrected QT Interval Using Heart Rate

The QT interval is a measure of the time between the start of the Q wave and the end of the T wave in the heart's electrical cycle. It can be corrected for heart rate for improved detection of patients at increased risk of ventricular arrhythmia.

The corrected QT interval is proportional to the QT interval times the square root of the heart rate.

Formula

QuantityVariable["QTc", "Time"] == QuantityVariable["QT", "Time"]/(2*Sqrt[15]*Sqrt[Quantity[1, IndependentUnit["beats"]/"Minutes"]/QuantityVariable["HR", "BeatRate"]])

symbol description physical quantity
QTc corrected QT interval "Time"
HR heart rate "BeatRate"
QT QT interval "Time"

Forms

Examples

Get the resource:

In[1]:=
ResourceObject["Corrected QT Interval Using Heart Rate"]
Out[1]=

Get the formula:

In[2]:=
FormulaData[ResourceObject["Corrected QT Interval Using Heart Rate"]]
Out[2]=

Use some values:

In[3]:=
FormulaData[ ResourceObject[ "Corrected QT Interval Using Heart Rate"], {QuantityVariable[ "QTc","Time"] -> Quantity[0.432`3., "Seconds"], QuantityVariable["QT","Time"] -> Quantity[0.4`3., "Seconds"]}]
Out[3]=

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