QTc (Bazett)
Heart-rate-corrected QT interval using Bazett's formula.
RESULT
QTc (Bazett)
What is QTc (Bazett)?
Heart-rate-corrected QT interval using Bazett's formula. QTc is intended for use in: Adults.
How to Use the QTc Calculator
- Enter QT interval in ms.
- Enter Heart rate in bpm.
- Enter Sex (optional, for threshold).
- Click Calculate to see your result and interpretation.
Formula & Version
This calculator uses formula version 1.0, last reviewed September 2026.
Clinical Considerations & Limitations
- Over-corrects at fast heart rates and under-corrects at slow heart rates — Fridericia's formula is often preferred outside the normal HR range.
References
- Bazett HC, Heart 1920;7:353-370
Frequently Asked Questions
What is QTc (Bazett)?
Heart-rate-corrected QT interval using Bazett's formula.
Who is QTc intended for?
Adults. Always confirm applicability to your specific patient before use.
What are the limitations of QTc?
Over-corrects at fast heart rates and under-corrects at slow heart rates — Fridericia's formula is often preferred outside the normal HR range.
What formula or reference does QTc use?
Bazett HC, Heart 1920;7:353-370
Is QTc a diagnosis?
No. QTc produces a score or estimate to support clinical decision-making — it is not a diagnosis and should be interpreted alongside full clinical judgement.
Medical Disclaimer: Medical calculators are provided for informational and educational purposes only. Results should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always verify results with a qualified healthcare professional.
