title: Fibroblast growth factor 23 as novel biomarker for early risk stratification after ST-elevation myocardial infarction.
abstract: Adverse left ventricular (LV) remodelling is the major determinant of heart failure and mortality in survivors of ST-elevation myocardial infarction (STEMI). The role of fibroblast growth factor 23 (FGF-23) for LV remodelling prediction after STEMI is unknown. We therefore aimed to investigate the relation between circulating FGF-23 and LV remodelling following revascularised STEMI.
  
  
  
  In this prospective observational study, we included 88 consecutive patients with STEMI treated by primary percutaneous coronary intervention. FGF-23 concentrations were measured 2 (IQR: 2-2) days after symptom onset. Cardiac magnetic resonance was performed 2 (IQR: 1-3) days as well as 4 (IQR: 4-5) months after infarction to evaluate LV remodelling, defined as ≥20% increase in LV end-diastolic volume.
  
  
  
  Levels of FGF-23 were significantly higher in patients who developed LV remodelling (n=11, 13%) as compared with those without LV remodelling (152.6 (102.5-241.3) vs 75.8 (58.6-105.4) relative units per millilitre, p=0.002). The association between FGF-23 and LV remodelling remained significant (OR: 14.1, 95% CI 2.8 to 70.9; p=0.001) after adjustment for biomarkers reflecting myocardial necrosis (high-sensitivity cardiac troponin T (hs-cTnT)), myocardial stress (N-terminal pro B-type natriuretic peptide (NT-proBNP)) and inflammatory state (high-sensitivity C reactive protein (hs-CRP)). Moreover, a multimarker approach adding FGF-23 to the established LV remodelling-predictive biomarkers (hs-cTnT, NT-proBNP and hs-CRP) led to a net reclassification improvement of 0.92 (95% CI 0.44 to 1.41, p<0.001) and to an integrated discrimination improvement of 0.16 (95% CI 0.08 to 0.24, p<0.001).
  
  
  
  Circulating FGF-23 is independently associated with LV remodelling after reperfused STEMI. A comprehensive multimarker strategy that includes FGF-23 provides incremental prognostic value for prediction of LV remodelling.
authors.affiliation: University Clinic of Internal Medicine III, Cardiology and Angiology, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Martin
authors.initials: M
authors.lastname: Reindl
authors.affiliation: University Clinic of Internal Medicine III, Cardiology and Angiology, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Sebastian Johannes
authors.initials: SJ
authors.lastname: Reinstadler
authors.affiliation: University Clinic of Internal Medicine III, Cardiology and Angiology, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Hans-Josef
authors.initials: HJ
authors.lastname: Feistritzer
authors.affiliation: University Clinic of Internal Medicine III, Cardiology and Angiology, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Lukas
authors.initials: L
authors.lastname: Mueller
authors.affiliation: University Clinic of Internal Medicine III, Cardiology and Angiology, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Constantin
authors.initials: C
authors.lastname: Koch
authors.affiliation: University Clinic of Radiology, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Agnes
authors.initials: A
authors.lastname: Mayr
authors.affiliation: University Clinic of Internal Medicine III, Cardiology and Angiology, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Markus
authors.initials: M
authors.lastname: Theurl
authors.affiliation: University Clinic of Internal Medicine III, Cardiology and Angiology, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Rudolf
authors.initials: R
authors.lastname: Kirchmair
authors.affiliation: University Clinic of Internal Medicine III, Cardiology and Angiology, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Gert
authors.initials: G
authors.lastname: Klug
authors.affiliation: University Clinic of Internal Medicine III, Cardiology and Angiology, Medical University of Innsbruck, Innsbruck, Austria.
authors.forename: Bernhard
authors.initials: B
authors.lastname: Metzler
mesh_terms: D015415:Biomarkers / Q000097:blood; D004562:Electrocardiography; D005260:Female; D000089703:Fibroblast Growth Factor-23; D005346:Fibroblast Growth Factors / Q000097:blood*; D005500:Follow-Up Studies; D006801:Humans; D019028:Magnetic Resonance Imaging, Cine; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011446:Prospective Studies; D018570:Risk Assessment; D000072657:ST Elevation Myocardial Infarction / Q000097:blood* / Q000175:diagnosis / Q000503:physiopathology; D020257:Ventricular Remodeling
chemical_list: D015415:Biomarkers; C000717427:FGF23 protein, human; D005346:Fibroblast Growth Factors; D000089703:Fibroblast Growth Factor-23