Obesity Surgery

, Volume 28, Issue 4, pp 932–938 | Cite as

Assessment of Atrial Fibrillation and Ventricular Arrhythmia Risk after Bariatric Surgery by P Wave/QT Interval Dispersion

  • Mustafa Yılmaz
  • Cihan Altın
  • Abdullah Tekin
  • Tansel Erol
  • İlker Arer
  • Tarık Zafer Nursal
  • Nurkan Törer
  • Varlık Erol
  • Haldun Müderrisoğlu
Original Contributions



The association of obesity with atrial fibrillation (AF) and with ventricular arrhythmias is well documented.


The aim of this study was to investigate whether weight reduction by a laparoscopic sleeve gastrectomy has any effect on P wave dispersion (PWD), a predictor of AF, and corrected QT interval dispersion (CQTD), a marker of ventricular arrhythmias, in obese individuals.


In a prospective study, a total of 114 patients (79 females, 35 males) who underwent laparoscopic sleeve gastrectomy were examined. The patients were followed 1 year. PWD and CQTD values before and 3rd, 6th, and 12th months after the surgery were calculated and compared.


There was a statistically significant decline in body mass index (BMI), PWD, and CQTD values among baseline, 3rd, 6th, and 12th months (p < 0.001 for all comparisons). Correlation analysis showed a statistically significant correlation between ΔPWD and ΔBMI (r = 0.719, p < 0.001), ΔPWD and Δleft ventricular end-diastolic diameter (LVEDD) (r = 0.291, p = 0.002), ΔPWD and Δleft atrial diameter (LAD) (r = 0.65, p < 0.001), ΔCQTD and ΔBMI (r = 0.266, p = 0.004), ΔCQTD and ΔLVEDD (r = 0.35, p < 0.001), ΔCQTD and ΔLAD (r = 0.289, p = 0.002). In multiple linear regression analysis, there was a statistically significant relationship between ΔPWD and ΔBMI (β = 0.713, p < 0.001), ΔPWD and ΔLVEDD (β = 0.174, p = 0.016), ΔPWD and ΔLAD (β = 0.619, p < 0.001), ΔCQTD and ΔBMI (β = 0.247, p = 0.011), ΔCQTD and ΔLVEDD (β = 0.304, p < 0.001), ΔCQTD and ΔLAD (β = 0.235, p = 0.009).


PWD and CQTD values of patients were shown to be attenuated after bariatric surgery. These results indirectly offer that there may be a reduction in risk of AF, ventricular arrhythmia, and sudden cardiac death after obesity surgery.


Bariatric surgery Atrial fibrillation Ventricular arrhythmia P wave dispersion QT interval dispersion Sudden cardiac death Arrhythmia 



The authors would like to thank their cardiology fellows due to value contributions.

Funding Source

This study was approved by Baskent University Institutional Review Board and Ethics Committee and supported by Baskent University Research Funding (KA 16/281).

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflicts of interest.

Ethical Approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed Consent Statement

After giving detailed information about the study, informed consent (writing) was obtained from all individual participants included in the study.


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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.Department of Cardiology, Adana Teaching and Research CenterBaskent UniversityAdanaTurkey
  2. 2.Department of CardiologyBaskent UniversityİzmirTurkey
  3. 3.Department of General SurgeryBaskent UniversityAdanaTurkey
  4. 4.Department of General SurgeryBaskent UniversityİzmirTurkey
  5. 5.Department of CardiologyBaskent UniversityAnkaraTurkey

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