Homocysteine predicts adverse clinical outcomes in unstable angina and non-ST elevation myocardial infarction: implications from the folate intervention in non-ST elevation myocardial infarction and unstable angina study

Jose B Nevado, Marcelo Severino B Imasa
Coronary Artery Disease 2008, 19 (3): 153-61

BACKGROUND: Unstable angina and non-ST elevation myocardial infarction (NSTEMI) are common acute coronary events. Homocysteine is a novel risk factor for coronary heart diseases. Together with the conventional risk factors, they may affect the outcome of non-ST coronary events.

OBJECTIVE: This study aims to determine the effect of clinical risk factors that are responsible for the occurrence of mortality, and the composite outcome of mortality, nonfatal myocardial infarction and serious rehospitalization within 6 months after the onset of non-ST acute coronary syndromes.

METHODS: A total of 124 Filipino patients were interviewed and tested for blood homocysteine levels and lipid profiles. Outcomes were assessed after 6 months.

RESULTS: Homocysteinemia (>16 micromol/l) is associated with increased mortality and composite outcomes (mortality, nonfatal reinfarction, and serious rehospitalization), even if adjusted for conventional risk factors. No association was detected for the conventional risk factors. Earlier acute coronary syndrome was found to be positively associated with mortality and the composite outcomes. Early stroke is associated with increased composite outcomes, whereas greater mortality and adverse outcomes were observed in NSTEMI compared with intermediate-risk unstable angina.

CONCLUSION: Increased homocysteine level is associated with mortality and serious nonfatal outcomes in patients with unstable angina and NSTEMI.

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