scholarly journals Long-term Prognostic Value for Patients with Chronic Heart Failure of Estimated Glomerular Filtration Rate Calculated with the New CKD-EPI Equations Containing Cystatin C

2014 ◽  
Vol 60 (3) ◽  
pp. 481-489 ◽  
Author(s):  
Elisabet Zamora ◽  
Josep Lupón ◽  
Marta de Antonio ◽  
Joan Vila ◽  
Judith Peñafiel ◽  
...  
Keyword(s):  
Heart Failure ◽  
Glomerular Filtration Rate ◽  
Glomerular Filtration ◽  
Cystatin C ◽  
Prognostic Value ◽  
Filtration Rate ◽  
Estimated Glomerular Filtration Rate ◽  
Isotope Dilution Mass Spectrometry ◽  
Intraclass Correlation ◽  
Net Reclassification Improvement

Abstract BACKGROUND Correct estimation of renal function is crucial in assessing prognosis of patients with heart failure (HF). Recently, two new equations have been proposed to calculate estimated glomerular filtration rate (eGFR) with cystatin C alone or both creatinine and cystatin C. We assessed the prognostic value of eGFR estimated by these new equations in outpatients with HF. METHODS The study included 879 patients with median age, 70.4 years; main etiology of HF ischemic heart disease, 52.7%; and median LVEF, 34%. RESULTS eGFR estimates by the new equations correlated significantly with eGFR estimates from previous equations, with the best correlation observed between the 2 equations containing cystatin C [intraclass correlation coefficient 0.95 (95% confidence interval 0.94–0.95)]. During a median follow-up of 3.94 years, 371 patients died. The Chronic Kidney Disease-Epidemiology Collaboration (CKD-EPI) equations containing cystatin C were found to be best for predicting death [area under the ROC curve 0.685 for CKD-EPI-cystatin C and 0.672 for CKD-EPI-creatinine-cystatin C vs 0.632 for simplified Modification of Diet in Renal Disease Study traceable to isotope dilution mass spectrometry and 0.643 for CKD-EPI (all P < 0.001)]. The CKD-EPI-cystatin C equations also showed significantly better calibration and reclassification measurements for both integrated discrimination improvement and net reclassification improvement in predicting death (P < 0.001). Reclassification with these new equations was particularly better in the subgroup with intermediate eGFR [45–74 mL · min−1 · (1.73 m2)−1]. CONCLUSIONS The two new CKD-EPI equations containing cystatin C are useful for HF risk stratification and show better prognostic performance than creatinine-only based eGFR equations, mostly in patients with intermediate eGFR. These equations seem appropriate for assessing prognosis of HF patients with moderate renal insufficiency.

scholarly journals Limited Value of Cystatin-C over Estimated Glomerular Filtration Rate for Heart Failure Risk Stratification

PLoS ONE ◽  
2012 ◽  
Vol 7 (12) ◽  
pp. e51234 ◽  
Author(s):  
Elisabet Zamora ◽  
Josep Lupón ◽  
Marta de Antonio ◽  
Joan Vila ◽  
Amparo Galán ◽  
...  
Keyword(s):  
Heart Failure ◽  
Glomerular Filtration Rate ◽  
Risk Stratification ◽  
Glomerular Filtration ◽  
Cystatin C ◽  
Filtration Rate ◽  
Estimated Glomerular Filtration Rate ◽  
Failure Risk

scholarly journals A Risk Score to Guide Cystatin C Testing to Detect Occult-Reduced Estimated Glomerular Filtration Rate

2015 ◽  
Vol 42 (2) ◽  
pp. 141-147 ◽  
Author(s):  
Carmen A. Peralta ◽  
Paul Muntner ◽  
Rebecca Scherzer ◽  
Suzanne Judd ◽  
Mary Cushman ◽  
...  
Keyword(s):  
Glomerular Filtration Rate ◽  
Glomerular Filtration ◽  
Racial Differences ◽  
Kidney Function ◽  
Cystatin C ◽  
Risk Score ◽  
Filtration Rate ◽  
Bayesian Model Averaging ◽  
Estimated Glomerular Filtration Rate ◽  
Risk Function

Background/Aims: Persons with occult-reduced estimated glomerular filtration rate (eGFR <60 ml/min/1.73 m2 detected by serum cystatin C but missed by creatinine) have high risk for complications. Among persons with preserved kidney function by creatinine-based eGFR (eGFRcreat >60 ml/min/1.73 m2), tools to guide cystatin C testing are needed. Methods: We developed a risk score to estimate an individual's probability of reduced eGFR by cystatin C (eGFRcys <60 ml/min/1.73 m2) in The Reasons for Geographic and Racial Differences in Stroke (REGARDS) study and externally validated in the Third National Health and Nutrition Examination Survey (NHANES III). We used logistic regression with Bayesian model averaging and variables available in practice. We assessed performance characteristics using calibration and discrimination measures. Results: Among 24,877 adults with preserved kidney function by creatinine, 13.5% had reduced eGFRcys. Older and Black participants, current smokers and those with higher body mass index, lower eGFRcreat, diabetes, hypertension and history of cardiovascular disease were more likely to have occult-reduced eGFR (p < 0.001). The final risk function had a c-statistic of 0.87 in REGARDS and 0.84 in NHANES. By risk score, 72% of occult-reduced eGFR cases were detected by screening only 22% of participants. Conclusions: A risk score using characteristics readily accessible in clinical practice can identify the majority of persons with reduced eGFRcys, which is missed by creatinine.

scholarly journals Performance of Cystatin C– and Creatinine-Based Estimated Glomerular Filtration Rate Equations Depends on Patient Characteristics

2015 ◽  
Vol 61 (10) ◽  
pp. 1265-1272 ◽  
Author(s):  
Jeffrey W Meeusen ◽  
Andrew D Rule ◽  
Nikolay Voskoboev ◽  
Nikola A Baumann ◽  
John C Lieske
Keyword(s):  
Glomerular Filtration Rate ◽  
Kidney Disease ◽  
Glomerular Filtration ◽  
Cystatin C ◽  
Filtration Rate ◽  
Estimated Glomerular Filtration Rate ◽  
Patient Characteristics ◽  
Transplant Recipients ◽  
Ckd Stage ◽  
Measured Gfr

Abstract BACKGROUND The Kidney Disease Improving Global Outcomes (KDIGO) guideline recommends use of a cystatin C–based estimated glomerular filtration rate (eGFR) to confirm creatinine-based eGFR between 45 and 59 mL · min−1 · (1.73 m2)−1. Prior studies have demonstrated that comorbidities such as solid-organ transplant strongly influence the relationship between measured GFR, creatinine, and cystatin C. Our objective was to evaluate the performance of cystatin C–based eGFR equations compared with creatinine-based eGFR and measured GFR across different clinical presentations. METHODS We compared the performance of the CKD-EPI 2009 creatinine-based estimated GFR equation (eGFRCr) and the newer CKD-EPI 2012 cystatin C–based equations (eGFRCys and eGFRCr-Cys) with measured GFR (iothalamate renal clearance) across defined patient populations. Patients (n = 1652) were categorized as transplant recipients (n = 568 kidney; n = 319 other organ), known chronic kidney disease (CKD) patients (n = 618), or potential kidney donors (n = 147). RESULTS eGFRCr-Cys showed the most consistent performance across different clinical populations. Among potential kidney donors without CKD [stage 2 or higher; eGFR &gt;60 mL · min−1 · (1.73 m2)−1], eGFRCys and eGFRCr-Cys demonstrated significantly less bias than eGFRCr; however, all 3 equations substantially underestimated GFR when eGFR was &lt;60 mL · min−1 · (1.73 m2)−1. Among transplant recipients with CKD stage 3B or greater [eGFR &lt;45 mL · min−1 · (1.73 m2)−1], eGFRCys was significantly more biased than eGFRCr. No clear differences in eGFR bias between equations were observed among known CKD patients regardless of eGFR range or in any patient group with a GFR between 45 and 59 mL · min−1 · (1.73 m2)−1. CONCLUSIONS The performance of eGFR equations depends on patient characteristics that are readily apparent on presentation. Among the 3 CKD-EPI equations, eGFRCr-Cys performed most consistently across the studied patient populations.

scholarly journals Arterial hypertension as a trigger for the development of cardiorenal failure in patients of different genders

2019 ◽  
Vol 34 (3) ◽  
pp. 114-121
Author(s):  
E. A. Lopina ◽  
N. P. Grishina ◽  
R. A. Libis
Keyword(s):  
Heart Failure ◽  
Glomerular Filtration Rate ◽  
Chronic Heart Failure ◽  
Ejection Fraction ◽  
Arterial Hypertension ◽  
Glomerular Filtration ◽  
Cystatin C ◽  
Filtration Rate ◽  
Left Ventricular ◽  
Left Ventricular Ejection

Aim. To study the peculiarities of changes in the functional state of the kidneys and heart muscle in patients with arterial hypertension.Materials and Methods. A total of 88 patients with arterial hypertension were included in the study. Chronic kidney disease was detected based on glomerular filtration rate, albuminuria, and cystatin levels in serum and urine. The stage of chronic heart failure was determined according to Strazhesko–Vasilenko classification with functional class according to NYHA; functional class of chronic heart failure was determined based on six-minute walking test. Patient inclusion criteria were the presence of essential hypertension of degree 1–3 and the age from 50 to 70 years. Patients underwent anthropometry, biochemical blood tests, six-minute walking test, and standard echocardiography.Results. Arterial hypertension of degree 1–2 was diagnosed in 50 patients including 33 women and 17 men. Grade 3 arterial hypertension was found in 38 patients (28 women and 10 men). Patients were divided into two groups according to gender. The groups with arterial hypertension degree 1–2 differed in their blood pressure levels. Echocardiography data showed the formation of heart failure with preserved ejection fraction. The groups differed in the values of left ventricular ejection fraction and end-systolic and end-diastolic sizes of the left ventricle. The levels of cystatin C in serum were elevated in both groups. The serum and urine creatinine levels and glomerular filtration rates differed between groups. Women had more significant decreases in the values of glomerular filtration rate, cystatin C, and urine creatinine. Correlation relationships were found between systolic blood pressure and glomerular filtration rate (r = 0.27, p < 0.05) and between systolic blood pressure and left ventricular back wall thickness (r = 0.41, p < 0.05). Inverse relationship was found between left ventricular ejection fraction and albuminuria (r = –0.31, p < 0.05). Cystatin C level had inverse relationship with glomerular filtration rate (r = –0.47, p < 0.05) and direct relationship with left ventricular myocardial mass index (r =  0.24, p  <  0.05).Discussion. Chronic kidney disease and chronic heart failure with preserved left ventricular ejection fraction were detected in patients at early stages. In the group of women, more pronounced changes in the renal and cardiac functions were found. Cystatin C is a marker of kidney function reduction and an alternative marker of chronic heart failure. The study showed that the level of cystatin C in blood serum of patients was increased, which correlated with the functional activities of the kidneys and the heart.Conclusion. In case of arterial hypertension in the presence of chronic kidney disease, the development of the left ventricular hypertrophy and heart failure with preserved ejection fraction was found. Women had more significant changes in the renal and cardiac functions compared with those in men. 

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