Usefulness of plasma vitamin B(6), B(12), folate, homocysteine, and creatinine in predicting outcomes in heart transplant recipients

The American Journal of Cardiology
Maher NahlawiKillian Robinson

Abstract

Atherothrombotic complications are frequently seen in patients undergoing heart transplantation. These patients have high plasma total homocysteine concentrations associated with lower folate and vitamin B(6) levels. The relation between these metabolic abnormalities and the development of vascular complications, however, remains unclear. Fasting plasma total homocysteine, folate, vitamin B(12), vitamin B(6), and creatinine were measured in 160 cardiac transplant recipients who were followed for a mean duration of 28 +/- 9 months after blood draw (mean 59 +/- 28 months after transplant). Cardiovascular events and causes of mortality were determined and Cox proportional-hazards regression analysis was used to identify the independent predictors for cardiovascular events and mortality. Twenty-five patients developed cardiovascular events and 17 died (11 cardiovascular deaths). Mean +/- SD total homocysteine value was 18.4 +/- 8.5 (range 4.3 to 63.5 micromol/L). Hyperhomocysteinemia (> or =15 micromol/L) was seen in 99 patients (62%). Levels were no different in patients with or without cardiovascular complications/death (16.8 +/- 6.2 vs 18.9 +/- 9 micromol/L, p = 0.4). However, vitamin B(6) deficiency was seen in 21% of recipient...Continue Reading

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