Research Progress on Risk Factors for Recurrent Syncope in Adults

Q: What is the clinical evidence from this study?

Study design: Review. Population: Recurrent syncope in adults. Intervention: Cardiogenic and non-cardiogenic risk factors for syncope recurrence. Primary outcome: Syncope recurrence and serious adverse events.

炳溪 韩

doi:10.12677/acm.2026.16103521

January 1, 2026Advances in Clinical MedicineOpen Access

Research Progress on Risk Factors for Recurrent Syncope in Adults

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Key result

Structural and electrical heart disease drive cardiogenic syncope recurrence, whereas autonomic dysfunction predicts non-cardiac events.

Why the study?

Syncope is increasingly recognized as a complex clinical syndrome involving multiple coexisting etiologies, mechanisms, and superimposed multisystem risks, requiring a systematic analysis of the risk factor spectrum for recurrence in adults.

Key Points

To systematically analyze the risk factor spectrum of recurrent syncope in adults and evaluate clinical risk stratification tools and management strategies.
Synthesized pathophysiological mechanisms and risk profiles across cardiogenic, vasovagal, and orthostatic syncope subtypes in adults.
Evaluated diagnostic performance and limitations of clinical prediction tools including the San Francisco Syncope Rule, Boston Criteria, EGSYS, FAINT, and Canadian Syncope Risk Score.
Structural heart disease and primary electrocardiographic disorders independently predict high-risk cardiogenic syncope, with markers such as RR pause >2 seconds and bundle branch block with HV interval ≥60 ms indicating elevated risk.
Mainstream scoring tools demonstrated varying accuracy: Canadian Syncope Risk Score had an AUC of 0.86 (sensitivity 89%, specificity 48%), SFSR had an AUC of 0.85 (sensitivity 87%, specificity 52%), and EGSYS had an AUC of 0.70–0.85 (sensitivity 82%, specificity 78%).
Non-cardiac drivers including multi-drug interactions, blood volume dysregulation, and autonomic neurodegeneration significantly increase fall injury and 30-day mortality risks, especially in elderly populations.

Structured PICO

P

Population

Adult patients with recurrent syncope, including older adults with multimorbidity, polypharmacy, and autonomic dysfunction.

This narrative review synthesizes cardiac and non-cardiac risk factors for adult recurrent syncope, advocating for multimodal risk stratification, AI tools, and multidisciplinary management to address evidence gaps in elderly multimorbid patients.

Limitations

Existing subtype classification frameworks struggle to capture overlapping mixed mechanisms.
Quantitative assessment of autonomic nervous system imbalance lacks unified standards for routine clinical use.
Cardiac electromechanical coupling abnormalities lack prospective cohort validation for their independent predictive value.
Existing risk factor studies are mostly single-center and retrospective with inconsistent definitions of recurrence.
Specific risk prediction models for older adults with multimorbidity and polypharmacy are lacking.
AI-assisted risk scoring systems have limited specificity and generalizability in complex clinical scenarios.
Existing subtype classification frameworks struggle to accurately capture mixed overlapping mechanisms.
Lack of unified standards for quantitative assessment of autonomic dysregulation, limiting clinical application.
Independent contribution of non-cardiac factors (drug interactions, psychiatric comorbidities) and synergistic effects in the elderly lack precise definition based on real-world data.
Most existing risk factor studies are single-center retrospective designs with inconsistent definitions of recurrence.
Lack of specific risk prediction models for elderly patients with multimorbidity and large-scale RCTs for medication deprescribing or non-pharmacological interventions.

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Implication

Supports mechanism-based evaluation in recurrent syncope; leaves open prospective validation of etiology-specific risk models.

Abstract

Syncope has evolved from a traditionally perceived benign event to a complex clinical syndrome with multiple system risks superimposed, where multiple etiologies and mechanisms can coexist.This article systematically analyzes the risk factor spectrum, pointing out that structural heart disease and primary electrocardiogram diseases are clear independent predictors of high-risk * 通讯作者。

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Cite This Study

炳溪韩 (2026) conducted a review in Recurrent syncope in adults. Cardiogenic and non-cardiogenic risk factors for syncope recurrence was evaluated on Syncope recurrence and serious adverse events. Structural heart disease and primary electrical diseases independently predict high-risk cardiogenic syncope recurrence, while drug interactions and autonomic dysfunction drive non-cardiac recurrence.

synapsesocial.com/papers/6af0db863c845ca7837cece6 https://doi.org/10.12677/acm.2026.16103521

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Research Progress on Risk Factors for Recurrent Syncope in Adults

Key Points

Structured PICO

Limitations

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

Research Progress on Risk Factors for Recurrent Syncope in Adults

Key Points

Structured PICO

Limitations

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

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