# Bazett formula

## Ba·zett for·mu·la

(bă-zet'),
a formula for correcting the observed QT interval in the electrocardiogram for cardiac rate (R-R interval): corrected QT = Q-T sec/√RR sec.

## Ba·zett for·mu·la

(bă-zet' fōrm'yū-lă)
A formula for correcting the observed QT interval in the electrocardiogram for cardiac rate (R-R interval): corrected QT = Q-T sec/.

## Bazett,

Henry, English cardiologist, 1885–.
Bazett formula - used for correcting the observed Q-T interval in the electrocardiogram for cardiac rate.
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References in periodicals archive ?
In the first method, the QTc was first determined by the new spline and Bazett formula and the JT interval was calculated by subtracting QRS duration from the corrected QT.
It is obtained through the Bazett formula: JTc = JT/RR interval.
Some other studies observed that corrected QT (QTc) values calculated from the Bazett formula yielded the most consistent results across different ranges of heart rate and age.
Vrtovec et al recorded 12 lead ECG and calculated QTc manually with the help of calipers and by using Bazett formula. In this study we determined QTc with the help of computer software.
The main limitations are due to additional sources of variability of the QT interval, the use of the Bazett formula, methodological difficulties in delineating the end of the T wave, lack of standardization for Tpe and QTd and no direct arrhythmia data.
Corrected QT (QTc) and QTc dispersion (QTcd) intervals were determined with the Bazett formula. Independent samples t and Chi-square tests were used for statistical analysis.
The QTc interval was calculated using the Bazett formula; QTc (ms) = QT measured/[square root of (RR)] (where RR is the RR interval).
Several calculations have been used to correct the measurement based on heart rate, and the most commonly employed is the Bazett formula (Bazett 1920).
QTmax was corrected for rate using using the Bazett formula (9): QTc = QT[square root] RR, where RR represents the R-R distance.
The QTc interval was calculated using the Bazett formula; QTc (ms) = QT measured /[square root of (RR)] (where RR is the RR interval).
QTc interval was considered prolonged when the value calculated using the Bazett formula was >0.44 second.
The QT and JT intervals were corrected for the heart rate using the Bazett formula (QTc and JTc) (9).

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