Serum cystatin C and left ventricular diastolic dysfunction in children with chronic kidney disease.

Source:http://linkedlifedata.com/resource/pubmed/id/16721586

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Authors

Devarajan P, Mishra J, Mitsnefes M, Kartal J, Kimbal T, Kathman T

Affiliation

Division of Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, University of Cincinnati, MLC 7022, 3333 Burnet Avenue, Cincinnati, OH, 45229-3039, USA. mark.mitsnefes@cchmc.org

Abstract

Previous studies indicate that serum cystatin C predicts incident heart failure in older adults. Children with chronic kidney disease (CKD) develop left ventricular (LV) diastolic dysfunction, often the initial abnormality of cardiac function. We hypothesized that cystatin C might predict LV diastolic dysfunction in children with CKD. Fifty-seven subjects, aged 6-21 years, with stage 2-4 CKD underwent echocardiography. Diastole was assessed from transmitral Doppler [maximum early (E wave) and late (A wave) diastolic flow velocities (E/A ratio)] and from tissue Doppler [septal mitral annular peak velocities (E')]. LV filling pressures were determined, using a ratio of E/E'. Fourteen (25%) patients had low E' and 15 (26%) had high E/E'. Children with abnormal E' or E/E' had significantly higher cystatin C levels than children with normal indices (P<0.05). Neither serum creatinine nor measured glomerular filtration rate (GFR) significantly correlated with E' or E/E'. Stepwise multiple regression analysis showed that cystatin C (beta=-0.825, P=0.023) and left ventricular mass (LVM) index (beta=0.099, P=0.006) independently predicted E'; LVM index independently predicted E/E' (beta=0.0173, P=0.01). We conclude that, in contrast to measured GFR or serum creatinine level, elevated serum cystatin C might be associated with diastolic dysfunction in children with CKD.

PMID
16721586

Publication types

Research Support, N.I.H., Extramural