Clinical use
Use this calculator for heart rate-corrected qt interval in thecardiovascular workflow. It is decision support and should be interpreted with the patient context, local protocols, and clinician judgment.
Calculate QTc
Interpretation
Bazett most common but overestimates at high HR. QTc >500 ms: significant risk of torsades. Review QT-prolonging medications. Fridericia preferred at extremes of HR.
Required inputs
- Qt
- Heart Rate
Optional: Formula
Evidence and limitations
This page cites 2 published references. Confirm units and inclusion criteria before applying the output; calculators do not replace assessment, escalation, or local policy.
References
- Bazett HC. Heart 1920;7:353-370
- Fridericia LS. Acta Med Scand 1920;53:469-486
Frequently asked questions
What is the QTc Correction?
QTc Correction is a clinical calculator used for Heart rate-corrected QT interval.
How do I interpret the QTc Correction?
Bazett most common but overestimates at high HR. QTc >500 ms: significant risk of torsades. Review QT-prolonging medications. Fridericia preferred at extremes of HR.
What inputs are required for the QTc Correction?
Required inputs include Qt, Heart Rate. Optional inputs include Formula.
What is the evidence behind the QTc Correction?
The QTc Correction page cites Bazett HC. Heart 1920;7:353-370; Fridericia LS. Acta Med Scand 1920;53:469-486.
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