title: Prognostic utility of anemia and pro-B-type natriuretic peptide in patients with nonischemic dilated cardiomyopathy and normal renal function.
abstract: BACKGROUND
  Idiopathic dilated cardiomyopathy frequently coexists with anemia and high plasma NT proBNP levels. However, the prognostic impact of these features on the disease course is uncertain, especially in patients with normal renal function.
  
  
  METHODS
  Forty-seven patients with idiopathic dilated cardiomyopathy with sinus rhythm and normal renal function were prospectively followed for a mean 25+/-18 months period. Clinical end points were death (sudden cardiac death and deaths because of worsening heart failure) and cardiac transplantation. Prognostic impact of NT proBNP levels, anemia, echocardiographic and clinical parameters on the clinical end points was evaluated with Kaplan-Meier survival analysis. Cut-off values of hemoglobin and plasma NT proBNP levels for predicting end points were determined by receiver operating curve analysis.
  
  
  RESULTS
  Twenty-eight patients (59.6%) suffered clinical end points. The patients who suffered clinical end points were anemic (P=0.002), had lower systolic (P<0.003) and diastolic (P<0.0001) blood pressures, and higher NYHA functional classes (P=0.005), lower left ventricle ejection fractions (P=0.003), higher E/A ratios (P=0.001), shorter E-wave deceleration times (P=0.001), isovolumetric relaxation times (P=0.05) and pulmonary acceleration times (P=0.004), and higher plasma NT proBNP levels (P<0.0001). Anemic patients had more clinical end points (P=0.002). In univariate analysis the prognostic predictors of life expectancy were log NT proBNP, anemia, NYHA functional class, systolic blood pressure, left ventricle ejection fraction, and E-wave deceleration time. However, multivariate analysis revealed only plasma NT proBNP as independent predictor of clinical end points.
  
  
  CONCLUSIONS
  Tracking plasma NT proBNP levels is a useful strategy during routine follow-ups of patients with nonischemic dilated cardiomyopathy. Its predictive value for prognosis needs more evaluation in larger controlled studies. In addition, the importance of anemia in those patients needs more study.
authors.affiliation: Cardiology Department, Kosuyolu Heart and Research Hospital, Istanbul, Turkey.
authors.forename: Kursat
authors.initials: K
authors.lastname: Tigen
authors.forename: Tansu
authors.initials: T
authors.lastname: Karaahmet
authors.forename: Cihan
authors.initials: C
authors.lastname: Cevik
authors.forename: Emre
authors.initials: E
authors.lastname: Gurel
authors.forename: Bulent
authors.initials: B
authors.lastname: Mutlu
authors.forename: Yelda
authors.initials: Y
authors.lastname: Basaran
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000740:Anemia / Q000097:blood / Q000150:complications* / Q000209:etiology; D002311:Cardiomyopathy, Dilated / Q000097:blood* / Q000150:complications* / Q000401:mortality / Q000503:physiopathology; D002648:Child; D004452:Echocardiography; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D007677:Kidney Function Tests; D008297:Male; D008875:Middle Aged; D020097:Natriuretic Peptide, Brain / Q000097:blood*; D010446:Peptide Fragments / Q000097:blood*; D011379:Prognosis; D011446:Prospective Studies; D012372:ROC Curve; D055815:Young Adult
chemical_list: D010446:Peptide Fragments; C109794:pro-brain natriuretic peptide (1-76); D020097:Natriuretic Peptide, Brain