Effects of Bariatric Surgery on Heart Rhythm Disorders: a Systematic Review and Meta-Analysis

Obes Surg. 2021 May;31(5):2278-2290. doi: 10.1007/s11695-021-05314-z. Epub 2021 Mar 13.


The aim of this systematic review is to provide an overview of the literature on the effects of bariatric surgery on obesity-associated electrocardiogram (ECG) abnormalities and cardiac arrhythmias. Fourteen studies were included with a methodological quality ranging from poor to good. Majority of the studies showed a significant decrease of QT interval and related measures after bariatric surgery. Seven studies were included in the meta-analysis on effects of bariatric surgery on QTc interval and a significant decrease in QTc interval of - 33.6 ms, 95%CI [- 49.8 to - 17.4] was seen. Bariatric surgery results in significant decrease in QTc interval and P-wave dispersion, i.e., a normalization of initial pathology. The effects on atrial fibrillation are conflicting and not yet fully understood.

Keywords: Atrial fibrillation; Bariatric surgery; Heart rhythm disorders; Metabolic surgery; Obesity.

Publication types

  • Meta-Analysis
  • Review
  • Systematic Review

MeSH terms

  • Atrial Fibrillation*
  • Bariatric Surgery*
  • Electrocardiography
  • Humans
  • Obesity
  • Obesity, Morbid* / surgery