Evidence map›Paper›PMID 23167578›Full record

ReviewBritish journal of clinical pharmacology2013

Drug induced QT prolongation: the measurement and assessment of the QT interval in clinical practice.

Geoffrey K Isbister, Colin B Page

Open access · bronzeAbstract readReview
In one paragraph

Review in British journal of clinical pharmacology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed, 1 pooled it
5.7field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

50 citing papers in PubMed, 1 synthesis or guideline pooled it, 143 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Trial
  4. Trial
  5. [Practical management of drug-induced long QT syndrome].Innere Medizin (Heidelberg, Germany) · 2026
    Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. Ventricular Tachycardia.Journal of education & teaching in emergency medicine · 2023
    Article
  11. Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Drug-Drug Interactions in Vestibular Diseases, Clinical Problems, and Medico-Legal Implications.International journal of environmental research and public health · 2021
    Review
  19. The QT Interval and Predicting Risk in Toxicology.Journal of medical toxicology : official journal of the American College of Medical Toxicology · 2021
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors at 2 institutions in 1 country.

Geoffrey K IsbisterDiscipline of Clinical Pharmacology, University of Newcastle, Newcastle, NSW 2298, Australia. geoff.isbister@gmail.com
Colin B Page
Calvary Mater Newcastle Hospital · AUPrincess Alexandra Hospital · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

There has been an increasing focus on drug induced QT prolongation including research on drug development and QT prolongation, following the removal of drugs due to torsades de pointes (TdP). Although this has improved our understanding of drug-induced QT prolongation there has been much less research aimed at helping clinicians assess risk in individual patients with drug induced QT prolongation. This review will focus on assessment of drug-induced QT prolongation in clinical practice using a simple risk assessment approach. Accurate measurement of the QT interval is best done manually, and not using the measurement of standard ECG machines. Correction for heart rate (HR) using correction formulae such as Bazett's is often inaccurate. These formulae underestimate and overestimate the duration of cardiac repolarization at low and high heart rates, respectively. Numerous cut-offs have been suggested as an indicator of an abnormal QT, but are problematic in clinical practice. An alternative approach is the QT nomogram which is a plot of QT vs. HR. The nomogram has an 'at risk' line and QT-HR pairs above this line have been shown in a systematic study to be associated with TdP and the line is more sensitive and specific than Bazett's QTc of 440 ms or 500 ms. Plotting the QT-HR pair for patients on drugs suspected or known to cause QT prolongation allows assessment of the QT interval based on normal population QT variability. This risk assessment then allows the safer commencement of drugs therapeutically or management of drug induced effects in overdose.

Indexed as

Drug-Related Side Effects and Adverse ReactionsElectrocardiographyHeart RateHumansLong QT SyndromeNomogramsPharmaceutical PreparationsRisk AssessmentRisk FactorsPharmaceutical Preparations

Identifiers

PMID23167578
PMCPMC3703227
OpenAlexW2147132879

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.