Noninvasive peripheral vascular function and atrial fibrillation in the general population

Area of Science:

• Cardiology
• Vascular Biology
• Epidemiology

Background:

• Arterial stiffness is a known predictor of atrial fibrillation.
• The relationship between noninvasively measured conduit artery function, peripheral vascular reactivity, and atrial fibrillation is not well understood.

Purpose of the Study:

• To investigate the association between noninvasive measures of vascular function and atrial fibrillation in a large population-based cohort.
• To determine if vascular function measures improve atrial fibrillation risk prediction.

Main Methods:

• The Gutenberg Health Study included 15,010 individuals (mean age 55 years, 50.5% men).
• Noninvasive vascular function was assessed using flow-mediated dilation (FMD) and peripheral arterial tonometry (PAT).
• Associations with atrial fibrillation (N=466) were analyzed using logistic regression, adjusting for age, sex, and cardiovascular risk factors.

Main Results:

• Individuals with atrial fibrillation showed altered brachial artery diameter, baseline pulse amplitude, FMD, and PAT ratio compared to those without.
• Age- and sex-adjusted analyses revealed associations between brachial artery diameter, PAT ratio, and atrial fibrillation.
• After adjusting for risk factors and heart rate, only reduced baseline pulse amplitude remained significantly associated with atrial fibrillation.

Conclusions:

• Peripheral vascular function is compromised in individuals with atrial fibrillation.
• These associations are largely explained by age and traditional cardiovascular risk factors.
• Noninvasive vascular function measures did not significantly improve the ability to discriminate individuals with atrial fibrillation.