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