Chronic Kidney Disease and Carotid Atherosclerosis in Patients With Acute Stroke.

BACKGROUND AND PURPOSE: Chronic kidney disease (CKD) is increasingly recognized as an independent risk factor for cardiovascular disease and stroke. Our aim was to examine the association between estimated glomerular filtration rate (eGFR) and carotid plaques, stenosis and occlusions, and to assess whether CKD and its severity affect carotid atherosclerosis in a cohort of unselected patients with acute stroke.

METHODS: A total of 249 consecutive patients with acute stroke (ischemic or hemorrhagic) were included in this study and baseline eGFR, carotid intima-media thickness (cIMT), and carotid stenosis were evaluated. The eGFR was calculated using the modified Modification of Diet in Renal Disease equation, which was adjusted for data from Chinese CKD patients. An eGFR rate of <60 mL/min/1.73 m was defined as CKD. The cIMT and carotid plaques were detected by carotid ultrasound.

RESULTS: CKD, defined as eGFR<60 mL/min/1.73 m, was found in 66 individuals (26.50%). Among the 5 subtypes, the level of low-density lipoprotein cholesterol was significantly higher in the moderate and severe stenosis groups compared with the normal, elevated cIMT and mild stenosis groups (P<0.01). The value of eGFR gradually decreased with increasing degree of carotid stenosis, and the differences between the groups were statistically significant (P<0.01). On linear regression analysis, eGFR was negatively correlated with the degree of carotid stenosis (r=0.03; P<0.05). On ordinal logistic regression analysis, eGFR was an independent risk factor associated with carotid atherosclerosis (1.05; 95% confidence interval, 0.47-1.63).

CONCLUSIONS: There was a significant burden of atherosclerosis among individuals with CKD. CKD is an independent predictor of carotid plaques, stenoses, and occlusions in patients with acute stroke.