脳卒中の予防と管理の統合戦略：エビデンスに基づく食事パターンからシステム的な順守まで

Highlights

• Adherence to Mediterranean and MIND diets is associated with a 74–75% reduction in the risk of total and ischemic stroke among high-risk populations.
• The Dietary Inflammatory Index (DII) and endothelial health serve as critical biomarkers for identifying stroke-prone dietary habits and underlying vascular mechanisms.
• Combining low-risk lifestyle habits with GLP-1 receptor agonists provides a 43% lower risk of major adverse cardiovascular events (MACE) than standard care.
• Teleneurology ward rounds and pharmacist-led medication management significantly improve guideline adherence and secondary prevention outcomes.

Background

Stroke remains a leading cause of disability and mortality globally, necessitating a multifaceted approach to both primary and secondary prevention. While the role of individual nutrients has been historically studied, contemporary research emphasizes holistic “dietary patterns” as more predictive of clinical outcomes. Concurrently, the “care gap” in secondary prevention—characterized by suboptimal medication adherence and delayed acute interventions—represents a significant hurdle in reducing the global stroke burden. This article synthesizes recent high-impact evidence regarding dietary interventions, pharmacological synergies, and systems-based improvements in stroke management.

Key Content

Primary Prevention: The Superiority of Mediterranean and MIND Diets

Recent prospective data from the PREDIMED trial (Castro-Barquero et al., 2026) have clarified the relative efficacy of different healthy dietary scores. In a cohort of 7,447 high-risk individuals, greater adherence to the Mediterranean diet (HR 0.26; 95% CI, 0.14-0.51) and the Mediterranean-DASH Diet Intervention for Neurodegenerative Delay (MIND) diet (HR 0.25; 95% CI, 0.13-0.51) was associated with a dramatic reduction in stroke incidence. Interestingly, in this specific population, the Dietary Approaches to Stop Hypertension (DASH) and the Planetary Health Diet Index did not reach statistical significance for stroke reduction, suggesting that the specific fat profiles (e.g., monounsaturated fats from olive oil) and neuroprotective components of the MIND diet may be particularly potent for cerebrovascular health (PMID: 41725539).

In Asian populations, the Dietary Inflammatory Index (DII) has emerged as a crucial tool. Research from Eastern China demonstrated that “Jiangnan red-sauce” patterns (high in refined grains and processed meats) correlate with high DII scores and an 85% increased risk of ischemic stroke, whereas traditional plant-rich diets show a protective effect (PMID: 41895834). In Korea, DASH adherence was specifically protective in females, reducing cardiovascular incidence by 40–47% (PMID: 41903890).

Mechanistic Insights: Endothelial Health and Inflammation

Evidence suggests that these dietary benefits are mediated primarily through the vascular endothelium. Healthy patterns increase nitric oxide bioavailability and reduce oxidative stress, thereby preventing the endothelial dysfunction (ED) that leads to atherosclerosis and impaired neuro-vascular coupling. Maintaining endothelial integrity is now recognized not just as a cardiac strategy, but as a primary neuroprotective strategy against cognitive decline and stroke (PMID: 41486026).

Pharmacological Synergies and Lifestyle Modification

The integration of modern pharmacotherapy with lifestyle habits represents a new frontier in prevention. Large-scale data from the US Veterans Affairs’ Million Veteran Program indicate that while GLP-1 receptor agonists independently reduce MACE risk (HR 0.84), their effect is profoundly amplified when combined with healthy lifestyle habits (restful sleep, physical activity, and high-quality diet), reaching a 43% risk reduction (PMID: 41763234). Similarly, the cumulative defined daily dose (cDDD) of statins shows a non-linear inverse correlation with ischemic stroke recurrence, with the highest exposure quartile achieving an 87.7% reduction in recurrence risk (PMID: 41576670).

Optimizing Systems of Care and Secondary Prevention

Clinical outcomes are increasingly dependent on the precision of delivery systems:

• Telemedicine: Teleneurological ward rounds in subacute stroke care have shown superiority over on-site consultations regarding guideline adherence (92% vs. 54%), particularly in secondary prevention planning (PMID: 41941227).
• Clinical Pathways: Standardized pathways in emergency departments significantly reduce times to CT imaging (<45 min) and initial assessment (<10 min), facilitating timely thrombolysis (PMID: 41944244).
• Adherence Support: Clinical pharmacist-led interventions have been shown to improve 3-month medication adherence (OR 3.03) and achieve greater LDL-C reductions compared to standard care (PMID: 41889023).
• Acute Management: For patients undergoing carotid endarterectomy, clevidipine has demonstrated superior adherence to narrow systolic blood pressure targets (130–145 mmHg) compared to standard labetalol/urapidil, potentially reducing hyperperfusion risks (PMID: 41857688).

Expert Commentary

The PREDIMED findings (Castro-Barquero et al.) are particularly notable for the divergence between the Mediterranean/MIND diets and the DASH diet in a Mediterranean population. This may reflect the “ceiling effect” where participants already have a high baseline intake of certain DASH components, or it may highlight the unique role of olive oil and nuts—central to MedDiet—in stabilizing carotid plaques.

Furthermore, the “adherence paradox” remains a clinical challenge. While we have highly effective statins and antihypertensives, the real-world impact is blunted by poor first-year adherence, which is associated with a 41% higher incidence of stroke in the elderly (PMID: 41893941). Clinicians should also be mindful of the “Frailty-Stroke Axis.” In patients with obstructive sleep apnea, severe frailty more than doubles the risk of recurrent stroke (HR 2.40), regardless of CPAP adherence, suggesting that frailty itself is a dominant biological driver that requires independent management (PMID: 41852085).

Conclusion

Stroke prevention has moved beyond simple dietary advice into a domain of integrated “lifestyle-pharmacotherapy-system” optimization. High-adherence to Mediterranean and MIND dietary patterns provides robust primary protection. For those with established disease, the focus must shift to technological and pharmacist-led interventions to close the care gap in secondary prevention. Future research should focus on the use of fNIRS-guided neurofeedback and other novel therapies to address complications like post-stroke depression, ensuring that recovery is as holistic as prevention (PMID: 41740752).

References

• Castro-Barquero S, et al. Adherence to Different Dietary Patterns and Subsequent Risk of Total, Ischemic, and Hemorrhagic Stroke. Stroke. 2026;57(4):945-956. PMID: 41725539.
• Dietary patterns and endothelium dysfunction: a literature review. Nutr Metab Cardiovasc Dis. 2026;36(5):104484. PMID: 41486026.
• Duan Y, et al. Dietary inflammatory index and unfavorable dietary patterns associated with ischemic stroke in China. Asia Pac J Clin Nutr. 2026;35(2):272-280. PMID: 41895834.
• Teleneurology vs On-Site Neurology Consultation for Postadmission Hospital Care of Stroke. JAMA Neurol. 2026. PMID: 41941227.
• Combined associations of GLP-1 receptor agonists and a healthy lifestyle with cardiovascular outcomes. Lancet Diabetes Endocrinol. 2026;14(4):317-326. PMID: 41763234.
• Association between the cumulative defined daily dose of statins and ischemic stroke recurrence. J Clin Neurosci. 2026;146:111873. PMID: 41576670.
• Adherence to Hypertension Medications During the First Year of Treatment in Elderly Patients. High Blood Press Cardiovasc Prev. 2026. PMID: 41893941.
• Functional near-infrared spectroscopy-guided neurofeedback for post-stroke depression. J Affect Disord. 2026;404:121494. PMID: 41740752.