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Corrected QT Interval (QTc)

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Step 1 of 5 20%

Formula *

Step 1 of 5

Heart rate/pulse *

Step 2 of 5
beats/min

Paper speed, mm/sec *

Step 3 of 5

QT interval unit *

Step 4 of 5

QT interval *

Step 5 of 5
msec

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    Bazett HC. An analysis of the time-relations of electrocardiograms. Heart. 1920;7:353-370.
    Fridericia LS. Die Systolendauer im Elektrokardiogramm bei normalen Menschen und bei Herzkranken. Acta Med Scand. 1920;53:469-486.
    Sagie A, Larson MG, Goldberg RJ, et al. An improved method for adjusting the QT interval for heart rate (the Framingham Heart Study). Am J Cardiol. 1992;70(7):797-801.
    Hodges M, Salerno D, Erlien D. Bazett's QT correction reviewed. J Electrocardiol. 1983;16(1):17-24.
    Rautaharju PM, Zhang ZM, Prineas R, Heiss G. Assessment of QT interval and QT dispersion for prediction of all-cause and cardiovascular mortality. Am J Cardiol. 2003;91(6):828-833.
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