Back to home
Health
Corrected QT (QTc)
QTc by Bazett: QT / √RR
Runs locally in your browser
Parameters
Results
- QTc (Bazett)
- 447 ms
- RR interval
- 0.8 s
- Interpretation
- Normal
At extreme heart rates, Fridericia or Framingham is preferred. Does not replace ECG interpretation.
How it works
Calculate rate-corrected QT interval (QTc) using Bazett's formula.
Who it's for: Clinicians reviewing ECG intervals for arrhythmia risk assessment.
QTc = QT / √RR where RR = 60/HR in seconds.
Prolonged QTc (>470–500 ms) may indicate arrhythmia risk.
Bazett is less accurate at extreme heart rates — other formulas may be preferred.
How to use
- Enter QT interval (ms) and Heart rate (bpm).
- Read QTc result.