(Hypertension. 1999;34:837-842.)
© 1999 American Heart Association, Inc.
Scientific Contributions |
Plasma Homocysteine, Aortic Stiffness, and Renal Function in Hypertensive Patients
From the Department of Internal Medicine and Inserm U 337, Broussais Hospital, APHP, Paris, France.
Correspondence to Pr M. SAFAR, Hôpital Broussais, Service de Médecine Interne, 96, rue Didot, 75014 Paris, France. E-mail michel.safar{at}brs.ap-hop-paris.fr
Abstract—Hyperhomocysteinemia has been associated with both vascular structure alterations and vascular clinical end points. To assess the relation between plasma homocysteine, structure and function of large arteries, and the presence of clinical vascular disease, we investigated a population of 236 hypertensive patients. We estimated arterial stiffness by measuring the carotid-femoral pulse wave velocity. Total plasma homocysteine was determined by fluorometric high-performance liquid chromatography. The presence of cardiovascular disease was defined on the basis of clinical events, including coronary heart disease, cerebrovascular disease, and peripheral vascular disease. In this population, pulse wave velocity was positively correlated with homocysteine, even after adjustments for age, mean blood pressure, extent of atherosclerosis, and creatinine clearance (P=0.016). Analysis of variance showed statistically significant differences between the mean values of homocysteine, creatinine clearance, and pulse wave velocity according to the extent of atherosclerosis, with an increase in these 3 parameters concomitant with an increase in the number of vascular sites involved with atherosclerosis. In conclusion, in hypertensive patients the levels of homocysteine are strongly and independently correlated to arterial stiffness measured by aortic pulse wave velocity. Plasma homocysteine, creatinine clearance, and aortic pulse wave velocity are higher in patients presenting with clinical vascular disease. These results suggest that the evaluation of aortic distensibility and homocysteine levels can help in cardiovascular risk assessment in hypertensive populations.
Key Words: homocysteine • arteries • blood flow velocity • vascular diseases • hypertension, renovascular
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