Key result
The QT nomogram provides a more sensitive and specific risk assessment for drug-induced torsades de pointes compared to Bazett's QTc cut-offs of 440 ms or 500 ms.
Why the study?
Does the QT nomogram improve the assessment of drug-induced QT prolongation risk compared to standard heart rate correction formulae?
Population
Patients at risk of drug-induced QT prolongation in clinical practice
Comparison
QT nomogram (plot of QT vs. HR) vs Standard heart rate correction formulae
Design
Review
Authors
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May support QT nomogram over Bazett's for torsades risk; leaves open prospective validation before practice change.
Does the QT nomogram improve the assessment of drug-induced QT prolongation risk compared to standard heart rate correction formulae?
The QT nomogram offers a more accurate and clinically useful method for assessing the risk of drug-induced torsades de pointes compared to traditional heart rate correction formulae like Bazett's.
Isbister et al. (2012) conducted a review in Drug-induced QT prolongation. QT nomogram vs. Bazett's correction formula was evaluated. The QT nomogram provides a more sensitive and specific risk assessment for drug-induced torsades de pointes compared to Bazett's QTc cut-offs of 440 ms or 500 ms.
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