What does this research mean for the field?

In patients with obesity and type 2 diabetes, atrial fibrillation and heart failure develop in close temporal proximity in a bidirectional manner, with the heart failure-first sequence being associated with lower long-term survival. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This research aims to clarify the temporal relationship between atrial fibrillation and heart failure in patients with obesity and type 2 diabetes.

June 7, 2026Diabetes

2959-LB: Temporal Sequencing of Heart Failure and Atrial Fibrillation in Patients with Obesity and Type 2 Diabetes: A Real-World Evidence Study

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Population

205,000 adults with type 2 diabetes and obesity who developed both atrial fibrillation and heart failure…

Design

Cohort

Follow-up

up to 72 months

Authors

PRPIERANTONIO RUSSOCalifornia Department of Parks and Recreation RNRamaa NathanCalifornia Department of Parks and Recreation WJWEI JIECalifornia Department of Parks and Recreation

Discussion

Member takes

Implication

In patients with obesity and type 2 diabetes, the temporal sequence of developing heart failure before atrial fibrillation is associated with worse long-term survival and higher stroke risk compared to developing atrial fibrillation first.

Key Points

This research aims to clarify the temporal relationship between atrial fibrillation and heart failure in patients with obesity and type 2 diabetes.
Conducted a retrospective cohort study using the Symphony Claims Database from 7/2018 to 11/2025.
Included adults with type 2 diabetes (≥2 claims ≥90 days apart) and a diagnosis of obesity (≥1 claim).
Defined cohorts based on the sequence of AF and HF diagnoses and analyzed survival using Kaplan Meier and Cox regression.
Among 205,000 patients, AF preceded HF in 34%, with median time from AF to HF being 221 days.
Patients with HF that developed after AF showed an increased comorbidity burden compared to those with AF preceding HF.
The lowest 72-month survival rate was observed in patients with HF→AF (62.2%).

Structured PICO

Population

205,000 adults with type 2 diabetes and obesity who developed both atrial fibrillation (AF) and heart failure (HF) without prior stroke, drawn from 8.8 million eligible patients in the Symphony Claims Database. Mean age 70, 55% male.

Outcome

Survival, stroke, and predictorshard clinical

Cite This Study

RUSSO et al. (2026) studied this question.

synapsesocial.com/papers/6a250b2d7def13d035e1b39b https://doi.org/10.2337/db26-2959-lb

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