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Cited by 219Atrial Fibrillation Management and OutcomesHeart Failure Treatment and ManagementCardiovascular Disease and Adiposity

Influence of Obesity on Outcomes in Atrial Fibrillation: Yet Another Obesity Paradox

Badheka, Apurva O., Rathod, Ankit, Kizilbash, Mohammad A., Garg, Neha, Mohamad, Tamam, Afonso, Luis, Jacob, Sony·2010·The American Journal of Medicine
DOI 10.1016/j.amjmed.2009.11.026
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Abstract

Background Obese patients have favorable outcomes in congestive heart failure, hypertension, peripheral vascular disease, and coronary artery disease. Obesity also has been linked with increased incidence of atrial fibrillation, but its influence on outcomes in atrial fibrillation patients has not been investigated. The objective of this research is to investigate the effect of obesity on outcomes in atrial fibrillation.Methods The Atrial Fibrillation Follow-up Investigation of Rhythm Management (AFFIRM) study was one of the largest multicenter trials of atrial fibrillation, with 4060 patients. Subjects were randomized to rate versus rhythm-control strategy. We performed a post hoc analysis of the National Heart, Lung and Blood Institute limited access dataset of atrial fibrillation patients who had body mass index (BMI) data available in the AFFIRM study. BMI data were not available on 1542 patients. Patients with BMI >or=18.5 were split into normal (18.5-25), overweight (25-30), and obese (>30) categories as per BMI (kg/m(2)). Multivariate Cox proportional hazards regression was used on the eligible 2492 patients. End points were all-cause mortality and cardiovascular mortality.Results Over three fourths of all patients in our cohort were overweight or obese. There were 304 deaths (103 among normal weight, 108 among overweight, and 93 among obese) and 148 cardiovascular deaths (54 among normal weight, 41 among overweight, and 53 among obese) over a mean period of 3 years of patient follow-up. On multivariate analysis, overweight (hazard ratio [HR] 0.64; 95% confidence interval [CI], 0.48-0.84; P=.001) and obese (HR 0.80; 95% CI, 0.68-0.93; P=.005) categories were associated with lower all-cause mortality as compared with normal weight. Overweight (HR 0.40; 95% CI, 0.26-0.60; P <.001) and obese patients (HR 0.77; 95% CI, 0.62-0.95; P=.01) also had lower cardiovascular mortality as compared with the normal weight patients.Conclusions Although in prior studies, obesity has been associated with increased risk of atrial fibrillation, an obesity paradox exists for outcomes in atrial fibrillation. Obese patients with atrial fibrillation appear to have better long-term outcomes than nonobese patients.

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Authors
Badheka, A. O., Rathod, A., Kizilbash, M. A., Garg, N., Mohamad, T., Afonso, L., & Jacob, S.
Affiliations
Wayne State University (US)
Corresponding author
Jacob, Sony
ORCID
Venue
The American Journal of Medicine
Publisher
Elsevier BV
Published
2010-07
Volume
123
Issue
7
Pages
646-651
ISSN
0002-9343 (ISSN-L)
DOI
10.1016/j.amjmed.2009.11.026
OpenAlex
W2071664844
Cited by
219
References
55
Citations by year
2026: 6 · 2025: 11 · 2024: 13 · 2023: 11 · 2022: 11 · 2021: 15 · 2020: 18 · 2019: 12 · 2018: 10 · 2017: 14 · 2016: 20 · 2015: 14 · 2014: 17 · 2013: 15 · 2012: 15
FWCI
10.32
Type
journal article
Language
en
Open access
closed
Licence
Locations
  • The American Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Heart, Lung and Blood Institute
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Atrial Fibrillation Management and Outcomes
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Heart Failure Treatment and Management
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Disease and Adiposity
Keywords
obesity, atrial fibrillation, obesity paradox, body mass index, all-cause mortality, cardiovascular mortality, rate control, rhythm control, AFFIRM trial, overweight, mortality risk stratification, atrial fibrillation risk factors, atrial fibrillation prognosis, atrial fibrillation prevention
MeSH terms
Aged, Anti-Arrhythmia Agents, Atrial Fibrillation, Female, Humans, Male, Middle Aged, Obesity, Risk Factors, Cohort Studies, Comorbidity, Proportional Hazards Models

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