Elevated homocysteine levels have been associated with increased risk for coronary heart disease. Which marker sits highest among these options for risk assessment?

• A. Homocysteine
• B. Vitamin B6
• C. Myoglobin
• D. pro-BNP

Answer: (A)

Elevated homocysteine contributes to cardiovascular risk through endothelial dysfunction, oxidative stress, and a tendency toward thrombosis, so it serves as a meaningful marker for coronary heart disease risk. Among the options, the homocysteine level itself best reflects CHD risk because higher levels are associated with greater risk, independent of traditional factors. In contrast, vitamin B6 is a nutrient involved in homocysteine metabolism, but its level isn’t used as a direct CHD risk marker. Myoglobin rises with acute muscle injury and is used for detecting myocardial infarction rather than for assessing long-term risk. pro-BNP relates to cardiac wall stress and helps evaluate heart failure risk and prognosis, not primary CHD risk.