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Homocysteine, a risk factor for coronary artery disease or not? A meta-analysis
T J Cleophas1, N Hornstra, B van Hoogstraten
1Department of Medicine, Albert Schweitzer Hospital, Dordrecht, The Netherlands. ajm.cleophas@wxs.nl
The American Journal of Cardiology
|October 29, 2000
Insights
Homocysteine may not directly harm the heart, but it can signal unhealthy habits. Cardiologists should consider homocysteine levels when evaluating coronary artery disease risk.
Area of Science:
- Cardiology
- Biochemistry
- Public Health
Background:
- Elevated homocysteine levels have been historically associated with increased cardiovascular risk.
- The direct causal role of homocysteine in heart disease remains a subject of ongoing research and debate.
Purpose of the Study:
- To re-evaluate the association between homocysteine and coronary artery disease (CAD) through a comprehensive meta-analysis.
- To investigate whether homocysteine acts as an independent risk factor or a marker for other lifestyle-related factors contributing to CAD.
Main Methods:
- Systematic review and meta-analysis of observational studies.
- Inclusion of studies examining homocysteine levels and the incidence or prevalence of coronary artery disease.
- Statistical analysis to assess the pooled effect and explore potential confounding factors.
Main Results:
- The meta-analysis indicates that homocysteine may not possess direct cardiotoxic effects as previously presumed.
- Homocysteine emerged as a significant indicator of unhealthy lifestyle choices, such as poor diet and lack of physical activity.
- These lifestyle factors, reflected by homocysteine levels, are strongly linked to the development of coronary artery disease.
Conclusions:
- The direct pathogenic role of homocysteine in coronary artery disease is questionable.
- Homocysteine serves as a valuable biomarker for identifying individuals with detrimental lifestyle patterns.
- Clinicians should consider homocysteine levels as part of a broader assessment of cardiovascular risk, focusing on associated lifestyle modifications.
Abstract:
This meta-analysis suggests that homocysteine may not be as harmful for the heart as it seems. At the same time, however, homocysteine may be an indicator for unhealthy lifestyles, and therefore, an important variable for cardiologists to take into account when assessing coronary artery disease.