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European Child & Adolescent Psychiatry

, Volume 27, Issue 7, pp 861–866 | Cite as

QT interval and dispersion in drug-free anorexia nervosa adolescents: a case control study

  • Monica Bomba
  • Lucio Tremolizzo
  • Fabiola Corbetta
  • Franco Nicosia
  • Francesca Lanfranconi
  • Gianni Poggioli
  • Karine Goulene
  • Marco Stramba-Badiale
  • Elisa Conti
  • Francesca Neri
  • Renata Nacinovich
Original Contribution
  • 143 Downloads

Abstract

Long QT values have been reported in patients with anorexia nervosa of the restricting type (ANr) potentially increasing the risk of fatal arrhythmia, especially if psychotropic drug treatment is required. Nevertheless, the previous studies on this topic are biased by drug exposure, long disease durations, and small sample sizes. This study is aimed at assessing QTc and QTcd values in ANr adolescents with recent onset and drug free, as compared to subjects affected by psychiatric disorders other than ANr. We evaluated QTc and its dispersion (QTcd) in a population of 77 drug-free ANr female adolescents and compared to an equal number of healthy controls (H-CTRL) and pathological controls (P-CTRL, mixed psychiatric disorders). The QT determination was performed on a standard simultaneous 12-lead ECG in blind by a single experienced investigator. QTc was calculated by the Bazett’s formula and QTcd was determined as the difference between the maximum and minimum QTc intervals in different leads. Only for ANr patients, clinico-demographic data, hormones, and electrolytes were obtained. QTc was slightly reduced in ANr patients (27.7 ms, < 10%, p < 0.0003) vs. controls, while QTcd was increased in P-CTRL (30%, p < 0.0003). Heart rate was significantly lower in ANr patients vs. controls (25%; p < 0.003). Tyroid hormones and serum potassium showed weak although significant positive correlations with QTc in ANr patients. QTcd displayed a weak negative correlation with the BMI percentile (r = − 0.262, p = 0.03). We reject the hypothesis that QTc and QTcd are increased in drug-free ANr adolescents with a relatively short-disease duration. Further studies are needed to understand if the previously reported increase might be related to other associated chronic disorders, such as hormonal or electrolyte imbalance.

Keywords

QTc QTcd Anorexia nervosa Drug-free Adolescence 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  • Monica Bomba
    • 1
    • 7
  • Lucio Tremolizzo
    • 2
    • 3
  • Fabiola Corbetta
    • 1
    • 7
  • Franco Nicosia
    • 4
  • Francesca Lanfranconi
    • 3
  • Gianni Poggioli
    • 5
  • Karine Goulene
    • 6
  • Marco Stramba-Badiale
    • 6
  • Elisa Conti
    • 3
  • Francesca Neri
    • 1
    • 3
    • 7
  • Renata Nacinovich
    • 1
    • 3
    • 7
  1. 1.Child and Adolescent Mental HealthUniversity of Milano-BicoccaMilanItaly
  2. 2.Neurology, ASST of MonzaUniversity of Milano-BicoccaMilanItaly
  3. 3.School of Medicine and Surgery and Milan-Center for Neuroscience (NeuroMI)University of Milano-BicoccaMilanItaly
  4. 4.Geriatric Unit, Spedali Civili, Department of Medical and Surgery SciencesUniversity of BresciaBresciaItaly
  5. 5.Sport Medicine“Papa Giovanni XXIII” HospitalBergamoItaly
  6. 6.Pediatric Arrhythmias CenterIRCCS Istituto Auxologico ItalianoMilanItaly
  7. 7.Child and Adolescent Mental Health Department“San Gerardo” HospitalMonzaItaly

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