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Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
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A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
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Exploring the Two Herb Combination Strategy to Treat Injured PC12 Cells
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Chuanxiong preparations for preventing stroke.

Xunzhe Yang1, Xiaoxi Zeng, Taixiang Wu

  • 1West China Hospital, Sichuan University, No. 37, Guo Xue Xiang, Chengdu, Sichuan, China, 610041.

The Cochrane Database of Systematic Reviews
|January 22, 2010
PubMed
Summary

Chuanxiong preparations, like Nao-an capsule, may help prevent stroke in high-risk adults. However, more high-quality research is needed to confirm these findings and ensure safety.

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Published on: December 9, 2018

Area of Science:

  • Neurology
  • Pharmacology
  • Preventive Medicine

Background:

  • Stroke is a leading cause of death and disability worldwide.
  • Effective stroke prevention strategies are crucial for public health.
  • Chuanxiong, a traditional Chinese herb, has a history of use in stroke prevention.

Purpose of the Study:

  • To evaluate the efficacy and safety of Chuanxiong preparations for stroke prevention in adults at high risk.
  • To synthesize evidence from randomized controlled trials (RCTs) on Chuanxiong's role in stroke prevention.

Main Methods:

  • Comprehensive literature search across multiple databases (e.g., CENTRAL, MEDLINE, EMBASE, CBM, CNKI) with no language restrictions.
  • Inclusion of RCTs assessing Chuanxiong preparations for stroke prevention.
  • Data extraction and analysis by independent reviewers, calculating odds ratios (OR) and mean differences with 95% confidence intervals (CI).

Main Results:

  • Three RCTs involving 5042 participants were included.
  • Nao-an capsule showed a potential reduction in stroke incidence compared to aspirin in one high-quality study (OR 0.56, 95% CI 0.33 to 0.96).
  • Two lower-quality studies suggested benefits for other Chuanxiong preparations in reducing stroke incidence and mortality, but with significant methodological limitations.

Conclusions:

  • Nao-an capsule may be a viable option for primary stroke prevention, though the supporting study had potential biases.
  • Evidence from other Chuanxiong preparations is currently too weak to draw firm conclusions due to poor study methodology.
  • Further high-quality research is essential to validate the effectiveness and safety of Chuanxiong preparations for stroke prevention.