Published online before print May 19, 2003, doi: 10.1161/01.HYP.0000075789.58883.73
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(Hypertension. 2003;42:14.)
© 2003 American Heart Association, Inc.
Scientific Contributions |
Mild Renal Dysfunction and Subclinical Cardiovascular Damage in Primary Hypertension
From the Department of Internal Medicine (G.L., F.V., D.P., S.V., E.R., M.R., C.T., G.P.B., G.D., R.P.) and the Department of Neurology (M.D.S.), University of Genoa, Genoa, Italy.
Correspondence to Roberto Pontremoli, MD, PhD, Department of Internal Medicine, University of Genoa, Viale Benedetto XV, 6-16132 Genoa, Italy. E-mail rpontrem{at}libero.it
The presence of mild renal dysfunction is associated with high cardiovascular morbidity and mortality rates in patients with primary hypertension. The pathophysiological mechanisms underlying this association are currently unknown. We investigated the relation between mild renal dysfunction and subclinical cardiovascular organ damage in 358 never previously treated patients with primary hypertension. Mild renal dysfunction was defined as a creatinine clearance <60 mL/min and/or the presence of microalbuminuria. Left ventricular mass index and carotid intima-media thickness were assessed by ultrasound scan. The prevalence of mild renal dysfunction, left ventricular hypertrophy, and carotid plaque was 18%, 48%, and 28%, respectively. Mild renal dysfunction was related to the presence of several risk factors, such as older age, higher blood pressure levels and lipid status, and smoking habits. Patients with the highest left ventricular mass and carotid intima-media thickness (upper quartiles) showed a higher prevalence of mild renal dysfunction (P<0.0001). After adjusting for duration of hypertension, mean blood pressure, smoking habits, and age, we found that the risk of left ventricular hypertrophy and/or carotid atherosclerosis increased by 43% with each SD reduction in creatinine clearance, and by 89% with each SD increase in albuminuria. Mild renal dysfunction is associated with preclinical end-organ damage in patients with primary hypertension. These data may help explain the high cardiovascular mortality rates reported in patients with low glomerular filtration rate or with increased albuminuria. The evaluation of creatinine clearance and urinary albumin excretion could be useful for identifying subjects at higher cardiovascular risk.
Key Words: albuminuria • carotid arteries • echocardiography • glomerular filtration rate • hypertension, arterial • ultrasonography
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