Cited by 15Cardiac electrophysiology and arrhythmiasCardiac pacing and defibrillation studiesCardiac Arrhythmias and Treatments

Electrocardiographic Biomarkers of Ventricular Repolarisation in a Single Family of Short QT Syndrome and the Role of the Bazett Correction Formula

Extramiana, Fabrice, Maury, Philippe, Maison-Blanche, Pierre, Duparc, Alexandre, Delay, Marc, Leenhardt, Antoine·2008·The American Journal of Cardiology

Abstract

The definition of the short QT syndrome (SQTS) is based on QT duration, but thorough QT- and T-wave evaluation has not been performed to date. To evaluate the influence of QT rate-correction formulas in SQTS diagnosis, 12-lead electrocardiograms (ECGs) were recorded in 27 subjects from a single family with SQTS. Based on QT duration corrected by Bazett formula (QTc), 4 men were considered to have SQTS (QTc <or=340 ms), and 16 were classified to have "suspected" SQTS (QT <or=320 ms and/or QTc <or=380 ms). Holter ECGs were recorded in the 4 patients with SQTS, 8 with suspected SQTS, and 62 healthy volunteers. We evaluated QT duration at each RR interval and calculated individual alpha coefficient of the QT/RR relation. The QT interval duration at the mean Holter heart rate was corrected using an individual approach and 5 "universal" correction formulas (Bazett, Fridericia, Sagie-Framingham, Hodges, Rautaharju). Patients with SQTS and controls had lower alpha coefficients of the QT/RR relation when compared with Bazett and Fridericia formulas. The QT rate-dependence was lower in patients with SQTS (alpha 0.146 +/- 0.070) when compared with control subjects (alpha 0.203 +/- 0.039, p <0.05). The universal correction-formulas consistently provided higher values of corrected QT interval duration at the mean Holter heart rate than a subject-specific correction formula (p <0.05), which induced false negative diagnoses. In conclusion, the Bazett correction formula is not appropriate for making a diagnosis of SQTS. The subject-specific correction formula may provide a better cut-off value definition for the diagnosis of SQTS.

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Crossref · 10.1016/j.amjcard.2007.10.049

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  • A subject-specific correction formula may provide a better cutoff value definition for the diagnosis of short QT syndrome.

    “the authors suggested that this formula may provide a better cutoff value definition for the diagnosis of SQTS.”

    From The Year of 2008 in Electrocardiology (2010) · cites this paper as [36]

  • In a single family with short QT syndrome, universal correction formulas consistently provided higher values of corrected QT interval duration at the mean Holter heart rate than a subject-specific correction formula.

    “Studying a single family with SQTS, Maison-Blanche and coworkers 36 demonstrated that the universal correction-formulas consistently provided higher values of corrected QT interval duration at the mean Holter heart rate than a subjectspecific correction formula; the authors suggested that this formula may provide a better cutoff value definition for the diagnosis of SQTS.”

    From The Year of 2008 in Electrocardiology (2010) · cites this paper as [36]

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Authors
Extramiana, F., Maury, P., Maison-Blanche, P., Duparc, A., Delay, M., & Leenhardt, A.
Affiliations
  • Assistance Publique – Hôpitaux de Paris (FR)
  • Hôpital Rangueil (FR)
Corresponding author
Extramiana, Fabrice
Venue
The American Journal of Cardiology
Publisher
Elsevier BV
Published
2008-03
Volume
101
Issue
6
Pages
855-860
ISSN
0002-9149 (ISSN-L)
OpenAlex
W2067588508
Cited by
15
References
28
Citations by year
2026: 1 · 2025: 1 · 2013: 1 · 2012: 1
FWCI
2.67
Type
journal article
Language
en
Open access
closed
Locations
  • The American Journal of Cardiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac pacing and defibrillation studies
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Arrhythmias and Treatments
Keywords
short QT syndrome, ventricular repolarization, QT interval correction, QT/RR relationship, Cronbach's alpha, Fridericia formula, Hodges formula, Holter monitoring, family studies, T wave changes
MeSH terms
Adolescent, Adult, Algorithms, Bradycardia, Diagnosis, Differential, Electrocardiography, Family, Female, Follow-Up Studies, Heart Rate, Humans, Male, Models, Theoretical, Pedigree, Prognosis, Genetic Predisposition to Disease

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