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QTc (Fridericia)

Fridericia: A cube-root correction formula often preferred in research and for patients with tachycardia or bradycardia.

Guidelines & Evidence

Verified

Last Review: 2026

When to Use

When to Use

To calculate the heart rate-corrected QT interval (QTc) on a standard 12-lead ECG.
Preferred over Bazett’s formula in patients with tachycardia (> 100 bpm) or bradycardia (< 60 bpm).
Widely used in clinical research and by the FDA for drug safety evaluations.

Last Comprehensive Review: 2026

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