What is the role of bariatric surgery in the etiology of sinus bradycardia?

Updated: Dec 27, 2017
  • Author: Mark W Livingston, MD; Chief Editor: Erik D Schraga, MD  more...
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Approximately 121,000 bariatric surgical procedures are performed annually. There are anecdotal reports of unexplained sinus bradycardia (SB) after significant weight loss, but no systematic studies have been conducted. Malik et al investigated the frequency of incident SB; its timing; and its association with weight loss, clinical characteristics, and predictors by evaluating the clinical characteristics of 151 consecutive patients who underwent bariatric surgery. [4] Twenty-five of 137 patients (18%) experienced postoperative SB. Patients with SB had significantly greater reduction in body mass index (BMI) than in those without bradycardia. Heart rate reserve (HRR) was significantly greater in patients with SB than in those without bradycardia. Multiple logistic regression analysis revealed that the odds of developing SB were 1.96 and 1.91 and associated with the percent decrease in BMI or increase in HRR, respectively. [4]

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