Volume 47, Issue 11 pp. 1464-1473
DEVICES

Association between obesity paradox in the all-cause mortality among patients with cardiac resynchronization therapy device

Phuuwadith Wattanachayakul MD

Corresponding Author

Phuuwadith Wattanachayakul MD

Department of Medicine, Jefferson Einstein Hospital, Philadelphia, Pennsylvania, USA

Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA

Correspondence

Phuuwadith Wattanachayakul, MD, Department of Medicine, Jefferson Einstein Hospital, Philadelphia, PA 19141, USA.

Email: [email protected]

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Panat Yanpiset MD

Panat Yanpiset MD

Department of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas, USA

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Chalothorn Wannaphut MD

Chalothorn Wannaphut MD

Department of Medicine, University of Hawaii John A. Burns School of Medicine, Honolulu, USA

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Thanathip Suenghataiphorn MD

Thanathip Suenghataiphorn MD

Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand

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Pongprueth Rujirachun MD

Pongprueth Rujirachun MD

Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand

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Pojsakorn Danpanichkul MD

Pojsakorn Danpanichkul MD

Department of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas, USA

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Natchaya Polpichai MD

Natchaya Polpichai MD

Department of Medicine, Weiss Memorial Hospital, Chicago, Illinois, USA

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Sakditad Saowapa MD

Sakditad Saowapa MD

Department of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas, USA

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Jakrin Kewcharoen MD

Jakrin Kewcharoen MD

Division of Cardiology, University of California San Francisco, San Francisco, California, USA

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Nipith Charoenngam MD

Nipith Charoenngam MD

Endocrine Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA

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Patompong Ungprasert MD

Patompong Ungprasert MD

Department of Rheumatic and Immunologic Diseases, Cleveland Clinic, Cleveland, Ohio, USA

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First published: 09 September 2024

Abstract

Background

Recent studies have demonstrated an obesity paradox, where obese patients with cardiovascular disease have a better outcome compared to those with normal weight. However, the effect of obesity and body mass index (BMI) on the outcome of patients with cardiac resynchronization therapy (CRT) devices remains unclear. The current study aims to investigate this relationship using all available published data.

Methods

We systematically reviewed studies from Medline and EMBASE databases from inception to January 2024. Eligible studies must investigate the association between BMI status and all-cause mortality in individuals with CRT devices. Relative risk (RR) or hazard ratio (HR) and 95% CIs were retrieved from each study and combined using the generic inverse variance method.

Results

A total of 12 cohort studies were included in the meta-analysis. Pooled analysis showed that overweight and obesity patients had lower all-cause mortality compared to those with normal body weight with the pooled risk ratios (RR) for overweight of 0.77 (95% CI 0.69–0.87, I2 47%) and for obesity of 0.81 (95% CI 0.67–0.97, I2 59%). Conversely, the underweight exhibited higher all-cause mortality than the group with normal weight, with a pooled RR of 1.37 (95% CI 1.14–1.64, I2 0%). Additionally, higher BMI as continuous data was associated with decreased all-cause mortality, with a pooled HR of 0.94 (95% CI 0.89–0.98, I2 72%).

Conclusions

The pooled analyses observed an obesity paradox in patients with CRT, where overweight and obesity were associated with reduced all-cause mortality, while underweight individuals exhibited higher all-cause mortality. Further research is necessary to investigate the underlying mechanisms and their implications for clinical practice.

CONFLICT OF INTEREST STATEMENT

The authors declare no conflicts of interest.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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