Coronary-Artery Calcification in Young Adults with End-Stage Renal Disease Who Are Undergoing Dialysis
William G. Goodman, M.D., Jonathan Goldin, M.D., Ph.D., Beatriz D. Kuizon, M.D., Chun Yoon, M.D., Ph.D., Barbara Gales, R.N., Donna Sider, R.N., Yan Wang, Ph.D., Joanie Chung, M.S., Aletha Emerick, Lloyd Greaser, M.P.H., Robert M. Elashoff, Ph.D., and Isidro B. Salusky, M.D.
Background Cardiovascular disease is common in older adultswith end-stage renal disease who are undergoing regular dialysis,but little is known about the prevalence and extent of cardiovasculardisease in children and young adults with end-stage renal disease.
Methods We used electron-beam computed tomography (CT) to screenfor coronary-artery calcification in 39 young patients withend-stage renal disease who were undergoing dialysis (mean [±SD]age, 19±7 years; range, 7 to 30) and 60 normal subjects20 to 30 years of age. In those with evidence of calcificationon CT scanning, we determined its extent. The results were correlatedwith the patients' clinical characteristics, serum calcium andphosphorus concentrations, and other biochemical variables.
Results None of the 23 patients who were younger than 20 yearsof age had evidence of coronary-artery calcification, but itwas present in 14 of the 16 patients who were 20 to 30 yearsold. Among those with calcification, the mean calcificationscore was 1157± 1996, and the median score was 297. Bycontrast, only 3 of the 60 normal subjects had calcification.As compared with the patients without coronary-artery calcification,those with calcification were older (26±3 vs. 15±5years, P<0.001) and had been undergoing dialysis for a longerperiod (14±5 vs. 4±4 years, P< 0.001). Themean serum phosphorus concentration, the mean calciumphosphorusion product in serum, and the daily intake of calcium were higheramong the patients with coronary-artery calcification. Among10 patients with calcification who underwent follow-up CT scanning,the calcification score nearly doubled (from 125±104to 249±216, P=0.02) over a mean period of 20±3months.
Conclusions Coronary-artery calcification is common and progressivein young adults with end-stage renal disease who are undergoingdialysis.
Source Information
From the Departments of Medicine (W.G.G., D.S.), Radiological Sciences (J.G., C.Y., A.E., L.G.), Pediatrics (B.D.K., B.G., I.B.S.), and Biomathematics (Y.W., J.C., R.M.E.), UCLA School of Medicine, Los Angeles.
Address reprint requests to Dr. Goodman at the Division of Nephrology, 7-155 Factor Bldg., UCLA Medical Center, 10833 Le Conte Ave., Los Angeles, CA 90095, or at wgoodman{at}ucla.edu.
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