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The implications of obesity for cardiac arrhythmia mechanisms and management
Rajeev K Pathak1, Rajiv Mahajan1, Dennis H Lau1
1Centre for Heart Rhythm Disorders (CHRD), South Australian Health and Medical Research Institute (SAHMRI), University of Adelaide and Royal Adelaide Hospital, Adelaide, Australia.
Insights
Obesity significantly increases the risk of cardiac arrhythmias, including atrial fibrillation, due to increased adiposity and metabolic changes. Weight reduction can effectively decrease the burden of atrial fibrillation in obese individuals.
Area of Science:
- Cardiology
- Metabolic Syndrome
- Obesity Research
Background:
- Rising obesity rates present a major health and economic challenge.
- Obesity is a known risk factor for cardiovascular diseases, including sudden cardiac death and atrial fibrillation.
- Increased body fat and associated metabolic issues create conditions conducive to cardiac arrhythmias.
Purpose of the Study:
- To review the mechanisms linking obesity to cardiac arrhythmias.
- To highlight the role of adipose tissue in atrial fibrillation development.
- To examine the impact of weight reduction on atrial fibrillation in obese patients.
Main Methods:
- Literature review focusing on obesity and cardiac arrhythmias.
- Analysis of studies investigating adipose depots and atrial fibrillation.
- Evaluation of research on weight reduction interventions and their effect on atrial fibrillation.
Main Results:
- Obesity contributes to an arrhythmogenic substrate through increased adiposity and metabolic dysfunction.
- Specific adipose depots play a pathogenic role in the development of atrial fibrillation.
- Weight reduction interventions have shown a decrease in atrial fibrillation burden in obese individuals.
Conclusions:
- Obesity is a significant driver of cardiac arrhythmias, particularly atrial fibrillation.
- Targeting adipose tissue and promoting weight loss are crucial strategies for managing atrial fibrillation in obese populations.
- Further research into the precise mechanisms is warranted to optimize therapeutic approaches.
Abstract:
The ever-increasing prevalence of obesity poses a significant burden on the health care system with escalating socioeconomic consequences. At the individual level, obesity is well recognized to increase morbidity and mortality. Not only is obesity an established cardiovascular risk factor, it also increases the risk of sudden cardiac death and atrial fibrillation. Studies have shown that increased adiposity itself and the accompanying metabolic consequences of weight gain contribute to an abnormal arrhythmogenic substrate. In this review, we focus on the diverse mechanisms underlying cardiac arrhythmias related to obesity. In particular, we highlight the pathogenic role of adipose depots leading to increased atrial fibrillation and the effect of weight reduction in decreasing atrial fibrillation burden in obese individuals.
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