[Homocysteine as a risk factor for ischemic heart disease]

Area of Science:

• Cardiovascular Medicine
• Biochemistry
• Epidemiology

Context:

• Hyperhomocysteinemia is a known risk factor for ischemic heart disease (IHD).
• The relationship between plasma total homocysteine (tHCY) and coronary atherosclerosis severity and morphology requires further investigation, particularly in diverse populations.
• Understanding these associations can inform preventative strategies for IHD.

Purpose:

• To investigate the association between plasma total homocysteine (tHCY) concentrations and the severity and morphology of coronary stenosis in Japanese patients.
• To determine if plasma tHCY levels are related to coronary spasm, a potential acute cause of IHD.
• To elucidate the specific mechanisms by which hyperhomocysteinemia contributes to IHD in this population.

Summary:

• A study of 238 Japanese patients revealed a positive correlation between plasma tHCY levels and coronary stenosis severity, with higher tHCY associated with more pronounced narrowing.
• Plasma tHCY levels were significantly higher in patients with diffuse coronary stenosis compared to those with no or focal stenosis.
• No significant difference in plasma tHCY levels was observed between patients with vasospastic angina and controls, indicating tHCY is not associated with coronary spasm.

Impact:

• The findings suggest that elevated plasma tHCY contributes to the development of ischemic heart disease in Japanese patients primarily through its role in chronic coronary atherosclerotic processes.
• This research highlights that hyperhomocysteinemia's impact on IHD in this population is linked to atherosclerosis, not acute coronary spasm.
• Further research is needed to clarify the role of tHCY in coronary thrombosis among Japanese patients.