title: N-terminal pro-B-type natriuretic peptide after high-dose chemotherapy: a marker predictive of cardiac dysfunction?
abstract: BACKGROUND
  Chronic cardiac dysfunction may develop after administration of aggressive chemotherapy, sometimes leading to development of congestive heart failure (CHF). Recently, N-terminal pro-B-type natriuretic peptide (NT-proBNP) was implicated as a marker of CHF. In this study we evaluated the predictive role of NT-proBNP in patients treated with high-dose chemotherapy (HDC).
  
  
  METHODS
  NT-proBNP was measured after 62 chemotherapy treatments in 52 patients affected by aggressive malignancies. Blood samples were drawn before the start of HDC, at the end of HDC administration, and 12, 24, 36, and 72 h thereafter. In these patients, echocardiograms were performed regularly during a 1-year follow-up.
  
  
  RESULTS
  Seventeen patients (33%) had persistently increased NT-proBNP, 19 patients (36%) had only transient increases (concentrations went back to baseline at 72 h), and 16 (31%) had no increases [mean (SD) values at 72 h, 1163 (936) ng/L vs 185 (101) ng/L vs 39 (19) ng/L, respectively; P <0.0001]. Only patients with persistently increased NT-proBNP had a significant worsening of the left ventricular diastolic indexes from baseline to 12 months [ratio of peak early to peak late flow velocities from 1.42 (0.33) to 0.78 (0.11); P <0.0001; isovolumetric relaxation time from 90 (15) to 141 (26) ms; P <0.0001; E-wave deceleration time from 162 (17) to 224 (32) ms; P = 0.0004] and of the left ventricular ejection fraction [from 62.8 (3.4)% to 45.6 (11.5)%; P <0.0001].
  
  
  CONCLUSIONS
  Persistently increased NT-proBNP early after administration of HDC is strongly associated with development of cardiac dysfunction. This finding has important implications for identifying patients at risk of developing chemotherapy-induced cardiotoxicity.
authors.affiliation: Epidemiology and Biostatistics Division, Hematoncology Division, European Institute of Oncology, Milan, Italy. maria.sandri@ieo.it
authors.forename: Maria T
authors.initials: MT
authors.lastname: Sandri
authors.forename: Michela
authors.initials: M
authors.lastname: Salvatici
authors.forename: Daniela
authors.initials: D
authors.lastname: Cardinale
authors.forename: Laura
authors.initials: L
authors.lastname: Zorzino
authors.forename: Rita
authors.initials: R
authors.lastname: Passerini
authors.forename: Paola
authors.initials: P
authors.lastname: Lentati
authors.forename: Maria
authors.initials: M
authors.lastname: Leon
authors.forename: Maurizio
authors.initials: M
authors.lastname: Civelli
authors.forename: Giovanni
authors.initials: G
authors.lastname: Martinelli
authors.forename: Carlo M
authors.initials: CM
authors.lastname: Cipolla
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000970:Antineoplastic Agents / Q000008:administration & dosage / Q000009:adverse effects*; D003430:Cross-Sectional Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D020097:Natriuretic Peptide, Brain; D009419:Nerve Tissue Proteins / Q000097:blood*; D010446:Peptide Fragments / Q000097:blood*; D012189:Retrospective Studies; D014463:Ultrasonography; D018487:Ventricular Dysfunction, Left / Q000139:chemically induced / Q000000981:diagnostic imaging* / Q000503:physiopathology
chemical_list: D000970:Antineoplastic Agents; D009419:Nerve Tissue Proteins; D010446:Peptide Fragments; C109794:pro-brain natriuretic peptide (1-76); D020097:Natriuretic Peptide, Brain