Diffuse interstitial fibrosis and myocardial dysfunction in early chronic kidney disease

The American Journal of Cardiology
Nicola C EdwardsRichard P Steeds

Abstract

Early-stage chronic kidney disease (CKD) is an under-recognized highly prevalent cardiovascular (CV) risk factor. Despite a clustering of conventional atherosclerotic risk factors, it is hypothesized that nonatherosclerotic processes, including left ventricular (LV) hypertrophy and fibrosis, account for a significant excess of CV risk. This cross-sectional observational study of 129 age- (mean age 57±10 years) and gender-matched subjects examined: nondiabetic CKD stages 2 to 4 (mean glomerular filtration rate 50±22 ml/min/1.73 m2) with no history of CV disease, subjects who are hypertensive with normal renal function, and healthy controls. Cardiac magnetic resonance imaging was performed for assessment of LV volumes and systolic function (myocardial deformation). Diffuse myocardial fibrosis was assessed using T1 mapping for native myocardial T1 times before contrast and myocardial extracellular volume (ECV) after gadolinium administration in combination with standard late gadolinium enhancement techniques for detection of coarse fibrosis. Patients with CKD had increased native T1 times (986±37 ms) and ECV (0.28±0.04) compared with controls (955±30 ms, 0.25±0.03) and subjects who are hypertensive (956±31 ms, 0.25±0.02, p<0.05). ...Continue Reading

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