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Updated: Aug 5, 2026
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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
Published on: August 18, 2015
High-altitude exposure and ischemic stroke: pathophysiological mechanisms and current perspectives
Yuhuan Qiao1,2, Yuding Luo2, Yu Hu1,2
1Department of Neurology, The Affiliated Hospital, Southwest Medical University, Luzhou, China.
Frontiers in Neurology
|August 4, 2026
Summary
High altitude environments increase stroke risk due to chronic hypoxia. Physiological adaptations can shift to maladaptation, promoting ischemic stroke through mechanisms like blood-brain barrier disruption and neuroinflammation.
Area of Science:
- Environmental Health
- Neurology
- Cardiovascular Physiology
Background:
- Stroke is a leading cause of death and disability globally.
- Environmental factors, particularly high altitude, are increasingly linked to stroke risk.
- High-altitude conditions (hypoxia, hypobaria, UV radiation) impact cardiovascular and cerebrovascular systems.
Purpose of the Study:
- To review the pathophysiology of ischemic stroke in high-altitude populations.
- To understand how high altitude modulates stroke risk and outcomes.
- To synthesize evidence on physiological adaptation and maladaptive injury at high altitude.
Main Methods:
- Narrative review of peer-reviewed, English-language studies.
- Literature search via PubMed and Google Scholar up to December 2025.
- Focus on physiological adaptation, maladaptive injury, and stroke implications.
Main Results:
- Mild hypoxia triggers beneficial acclimatization (hematologic, ventilatory, cerebral blood flow adaptations).
- Progressive or prolonged hypoxia leads to maladaptation (excessive erythropoiesis, hyperviscosity, endothelial dysfunction, neuroinflammation, oxidative stress).
- Maladaptive changes promote thrombogenesis and neuronal injury, increasing ischemic stroke susceptibility.
Conclusions:
- High altitude poses significant risks for ischemic stroke.
- The transition from acclimatization to maladaptation is critical.
- Further research is needed for targeted interventions and evidence-based strategies for high-altitude populations.
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