Template:QTc Calculator: Difference between revisions
(Create QTc calculator template (Bazett and Fridericia)) |
(Add references) |
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| style="background:#e74c3c; color:white; text-align:center; font-weight:bold;" | >500 ms | | style="background:#e74c3c; color:white; text-align:center; font-weight:bold;" | >500 ms | ||
| '''Significantly prolonged''' — High risk for '''Torsades de Pointes'''. Discontinue offending agents. Check Mg²⁺/K⁺/Ca²⁺. | | '''Significantly prolonged''' — High risk for '''Torsades de Pointes'''. Discontinue offending agents. Check Mg²⁺/K⁺/Ca²⁺. | ||
|} | |||
{| class="wikitable" style="width:100%; margin-top:4px; font-size:90%;" | |||
! References | |||
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* Bazett HC. An analysis of the time-relations of electrocardiograms. Heart. 1920;7:353-370. | |||
* Fridericia LS. Duration of systole in electrocardiogram. Acta Med Scand. 1920;53:469-486. | |||
* Viskin S. Long QT syndromes and torsade de pointes. Lancet. 1999;354:1625-1633. PMID 10560690. | |||
|} | |} | ||
</div> | </div> | ||
Revision as of 12:55, 21 March 2026
Interactive Corrected QT Interval (QTc) calculator using Bazett's formula. Requires the calculator gadget.
Usage: {{QTc Calculator}}
| Parameter | Value |
|---|---|
| QT Interval (ms) | |
| Heart Rate (bpm) | |
| RR Interval (ms) — auto-calculated from HR | ms |
| Results | |
| QTc (Bazett's) — QT / √(RR in sec) | ms |
| QTc (Fridericia) — QT / ∛(RR in sec) | ms |
| Interpretation (Bazett's QTc) | |
|---|---|
| <440 ms | Normal QTc for males. |
| <460 ms | Normal QTc for females. |
| 440–500 ms | Borderline/Prolonged — Monitor closely. Review medications for QT-prolonging drugs. |
| >500 ms | Significantly prolonged — High risk for Torsades de Pointes. Discontinue offending agents. Check Mg²⁺/K⁺/Ca²⁺. |
| References |
|---|
|