Cardiology

Corrected QT (QTc, Fridericia)

Cube-root heart-rate correction of QT.

Education and reference only. Not a substitute for clinical judgement, local policy or product labelling. Always verify before clinical use. Values are calculated in your browser and never stored.

When to use

Use as an alternative QT correction (Fridericia), which performs better than Bazett at high and low heart rates.

Why use

It reduces the over/under-correction seen with Bazett at extremes of rate.

Evidence & references

Fridericia LS. Die Systolendauer im Elektrokardiogramm bei normalen Menschen. Acta Med Scand. 1920.

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