Incidence, Risk Factors, and Outcomes in Stressor-Associated Atrial Fibrillation: Insights From the VITAL-AF Trial

Area of Science:

• Cardiology
• Internal Medicine
• Public Health

Background:

• Stressor-associated atrial fibrillation (AF) is frequently diagnosed but poorly understood.
• Risk factors, outcomes, and management of stressor-associated AF require further investigation.

Purpose of the Study:

• To analyze risk factors, outcomes, and management of stressor-associated AF.
• To compare stressor-associated AF with primary AF in a large primary care population.

Main Methods:

• Analysis of data from the VITAL-AF cluster-randomized trial (N=30,265).
• Comparison of clinical risk factors, incident AF (stressor-associated vs. primary), and oral anticoagulant initiation.
• Cox proportional hazards models assessed composite endpoint of major bleeding, stroke, and mortality.

Main Results:

• Nearly one-third (29%) of incident AF cases were stressor-associated.
• Clinical risk factors showed similar associations for both AF types.
• Oral anticoagulant initiation was significantly lower for stressor-associated AF (56%) vs. primary AF (75%).
• Stressor-associated AF demonstrated a higher risk for adverse outcomes (HR, 6.13) compared to no AF.

Conclusions:

• Stressor-associated AF is a significant clinical entity with high adverse event rates.
• Lower anticoagulant use in stressor-associated AF warrants further investigation and optimized management strategies.
• Future research should focus on prevention, surveillance, and treatment of stressor-associated AF.