Diagnostic value of serum NGAL and Cys-C for early renal damage in aged patients with chronic heart ;failure of coronary heart disease / 心血管康复医学杂志

ABSTRACT

Objective:To explore the relationship among serum neutrophil gelatinase associated lipocalin (NGAL), cystatin C (Cys-C) levels and cardiac, renal function;and diagnostic value of NGAL and Cys-C for early renal damage in aged patients With coronary heart disease (CHD).Methods:According to NYHA cardiac function classi-fication,a total of 84 aged CHD patients Were divided into class I group (n=30),class Ⅱ group (n=28)and classⅢ-Ⅳ group (n=26).Another 31 aged healthy objects Were selected as healthy control group.Serum N terminal pro B-type natriuretic peptide (NT-proBNP),NGAL and Cys-C etc. levels Were measured,and the correlation a-mong serum NGAL,Cys-C levels and cardiac function,estimated glomerular filtration rate (eGFR)Were analyzed. The accuracy of serum NGAL and Cys-C diagnosing renal insufficiency Was evaluated by receiver operator character-istic curve (ROC).Results:Along With NYHA class increased,there Were significant increase in serum levels of NGAL [(36.96±21.23)μg/L vs.(87.80±61.40)μg/L vs.(141.21±92.96)μg/L vs.(198.15±98.46)μg/L] and Cys-C [(0.75±0.64)mg/L vs.(1.40±1.88)mg/L vs.(2.33±2.03)mg/L vs.(3.45±1.81)mg/L]in healthy control group,NYHA I,Ⅱ,Ⅲ-Ⅳ groups,and they Were highest in NYHA class Ⅲ-Ⅳ group,there Was significant difference in serum NGAL level betWeen any tWo groups among the four groups (P0.05). Pearson correlation analysis indicated that serum NGAL and Cys-C levels Were positively correlated With NT-proBNP (r=0.842,0.718,P<0.01 both),and negatively correlated With eGFR (r=-0.689,-0.448,P<0.01 both), and serum NGAL level had closer correlation With NT-proBNP and eGFR.Area under ROC of serum NGAL and Cys-C Were 0.884 and 0.744 respectively in diagnosing renal insufficiency.Conclusion:Serum NGAL and Cys-C lev-els have good correlation With cardiac and renal function in aged CHD patients,Which are sensitive and accurate in-dexes for diagnosing early renal damage.