NDT Advance Access published online on October 12, 2005
Nephrology Dialysis Transplantation, doi:10.1093/ndt/gfi196
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1 Dialysis and Transplantation Center, ‘C.I. Parhon’ University Hospital, Ia
* To whom correspondence should be addressed. Background. Measures of aortic stiffness--aortic pulse wave velocity (PWV) and augmentation index (AIx)--have been shown to be powerful predictors of survival in adult haemodialysis (HD) patients. Very few data have been reported regarding arterial stiffness in paediatric renal populations. Methods. PWV and aortic AIx were determined from contour analysis of arterial waveforms recorded by applanation tonometry using a SphygmoCor device in 14 children on HD (age = 14.1 years) and in 15 age, height matched children controls. Results. Pre-HD AIx (29.7±15.4%) and PWV (6.6±1.0 m/s) were significantly higher compared with children controls (8.3±8.0% and 5.4±0.6 m/s, respectively, P<0.0001). The only significant difference between normal and HD children was BP level: 103/61 vs 114/72 mmHg, P<0.05. In children of HD patients, a multiple linear regression model including BP, age, height, weight, Ca and P levels as independent variables accounted for 57% of the variability in AIx. Dialysis had no impact on AIx (post-HD: 28.5±12.7%) or on PWV (post-HD: 6.7±0.8 m/s). Conclusions. We show, in this first-ever report of increased arterial stiffness in children on dialysis, that end-stage renal disease is associated with abnormalities in arterial wall elastic properties, comparable with adult levels, even in childhood. Most importantly, the absence of a discernalble amelioration with dialysis implies that purely structural and not functional alterations lie behind the increased arterial stiffness.
Received July 1, 2005
Accepted September 9, 2005
Original Articles
Increased arterial stiffness in children on haemodialysis
i, Romania
2 Nephrology and Dialysis Unit, ‘Sf. Maria’ Children Hospital, Ia
i, Romania
3 Adult Renal Unit, Guy's Hospital, London, UK
Adrian Covic, E-mail: acovic{at}xnet.ro
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