Bazett and Fridericia Corrections — Drug-Induced QT Prolongation Detection
Primary Reference
Bazett HC / Fridericia LS
Heart 1920 / Acta Med Scand 1920
ECG Parameters
1. QT Interval (ms)
Measured from Q-wave onset to T-wave end
2. Heart Rate (bpm)
Resting heart rate from same ECG
3. Sex
QTc thresholds differ by sex
Analysis Required
Enter patient parameters to calculate corrected QT interval.
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ms (Bazett)
QTc Assessment
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QTc (Bazett)
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QTc (Fridericia)
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Normal <440Borderline 440–500Prolonged >500
Score Breakdown
Clinical Implication
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References & Original Research ↕ Hover to expand
1
Bazett HC.An analysis of time-relations of electrocardiograms. Heart 1920;7:353–370. View ↗
2
Fridericia LS.Die systolendauer im Elektrokardiogramm bei normalen Menschen. Acta Med Scand 1920;53:469–486. View ↗
3
Drew BJ, Ackerman MJ, Funk M, et al.Prevention of torsade de pointes in hospital settings (AHA scientific statement). Circulation 2010;121:1047–1060. View ↗