Emerging risk factors for ischemic stroke

Area of Science:

• Neurology
• Cardiovascular Science
• Genetics

Background:

• Elevated homocysteine (Hcy) is increasingly recognized as a significant risk factor for cerebrovascular diseases.
• Prospective studies indicate a dose-dependent relationship between Hcy levels and vascular risk.

Purpose of the Study:

• To summarize the evidence linking homocysteine to cerebrovascular disease risk.
• To explore the role of MTHFR polymorphism and Hcy in specific conditions like dissection and atrial fibrillation.
• To highlight ongoing trials investigating Hcy-lowering interventions.

Main Methods:

• Review of six prospective studies examining homocysteine levels and cerebrovascular disease.
• Analysis of Hcy levels in relation to traditional cardiovascular risk factors, smoking, and hypertension.
• Inclusion of recent findings on MTHFR polymorphism and preliminary data on atrial fibrillation.

Main Results:

• Vascular risk associated with homocysteine is dose-dependent and independent of traditional risk factors.
• A synergistic effect of Hcy with smoking and hypertension on vascular risk was observed.
• Hyperhomocysteinemia and MTHFR polymorphism are identified as independent risk factors for dissection.
• Preliminary data suggest hyperhomocysteinemia is a risk factor for cerebrovascular events in atrial fibrillation patients.

Conclusions:

• Homocysteine is a significant, independent risk factor for cerebrovascular disease.
• Further research and intervention trials are warranted to assess the efficacy of lowering Hcy levels for stroke prevention.