Prevalence of asymptomatic atrial fibrillation and risk factors associated with asymptomatic status: a systematic review and meta-analysis - Report - MDSpire
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Prevalence of asymptomatic atrial fibrillation and risk factors associated with asymptomatic status: a systematic review and meta-analysis
Clinical Report: Prevalence and Risk Factors of Asymptomatic Atrial Fibrillation
Overview
This systematic review and meta-analysis found that approximately 27% of atrial fibrillation (AF) patients are asymptomatic. Key risk factors positively associated with asymptomatic AF include male sex, diabetes mellitus, chronic kidney disease, and prior stroke or transient ischemic attack, while heart failure is negatively associated.
Background
Atrial fibrillation is the most common cardiac arrhythmia, affecting about 2% of the general population and associated with increased morbidity and mortality. Symptoms of AF vary but many patients remain asymptomatic, complicating diagnosis and management. Asymptomatic AF patients share similar risks of adverse outcomes as symptomatic patients and may have a higher risk of disease progression. Current guidelines recommend screening in older adults, but screening practices do not specifically target asymptomatic individuals due to limited evidence.
Data Highlights
Parameter
Odds Ratio (OR)
95% Confidence Interval
P-value
I2 (%)
Prevalence of asymptomatic AF
27%
22% - 33%
–
100
Male sex
1.67
1.48 - 1.89
<0.001
85
Diabetes mellitus
1.19
1.07 - 1.33
0.002
87
Chronic kidney disease
1.21
1.08 - 1.36
<0.001
80
Stroke/transient ischemic attack
1.43
1.18 - 1.73
<0.001
95
Heart failure
0.71
0.54 - 0.94
0.017
97
Permanent AF
2.13
1.28 - 3.55
0.004
98
Catheter ablation
0.63
0.44 - 0.91
0.012
95
Beta-blockers
0.90
0.82 - 0.98
0.018
68
Antiarrhythmics
0.53
0.35 - 0.79
0.002
95
Key Findings
Approximately 27% of AF patients are asymptomatic, with prevalence varying by population risk factors.
Male sex is significantly associated with higher odds of asymptomatic AF (OR 1.67).
Diabetes mellitus, chronic kidney disease, and prior stroke or transient ischemic attack increase the likelihood of asymptomatic AF.
Heart failure is negatively associated with asymptomatic AF (OR 0.71), indicating symptomatic presentation is more common in these patients.
Permanent AF is positively associated with asymptomatic status, whereas interventions such as catheter ablation, beta-blockers, and antiarrhythmic drugs are negatively associated.
These associations are consistent regardless of symptom assessment methods, study design, or whether AF was incident or prevalent.
Clinical Implications
Given the high prevalence of asymptomatic AF and its association with specific risk factors, clinicians should consider targeted screening strategies in patients with diabetes, chronic kidney disease, prior stroke/TIA, and males. Early identification of asymptomatic AF may help prevent disease progression and adverse outcomes. Treatment and rhythm control interventions appear less common in asymptomatic patients, highlighting the need for awareness and appropriate management.
Conclusion
Asymptomatic AF affects over a quarter of AF patients and is linked to distinct clinical characteristics. Incorporating risk factor profiles into screening protocols may improve detection and management of this high-risk subgroup.
References
Systematic Review and Meta-Analysis 2025 -- Frequency and Associated Risk Factors of Asymptomatic Atrial Fibrillation
