High-sensitive troponin T in chronic heart failure correlates with severity of symptoms, left ventricular dysfunction and prognosis independently from N-terminal pro-b-type natriuretic peptide.
ABSTRACT Troponin T is an established marker of myocardial ischemia. We speculated that the role of the new high-sensitive troponin T (hs-cTnT) might expand towards non-ischemic myocardial disease, indicate disease severity and allow for prognostication in chronic heart failure.
Hs-cTnT (Roche Diagnostics, Mannheim, Germany) was assessed in 233 individuals with chronic heart failure (n=149) or healthy controls (n=84).
Hs-cTnT was significantly elevated in patients with chronic heart failure [0.018 ng/mL, interquartile range (IQR) 0.009-0.036 ng/mL, vs. controls 0.003 ng/mL, 0.003-0.003 ng/mL, p<0.001] and positively correlated with N-terminal pro-b-type natriuretic peptide (NT-proBNP) (r=0.79, p<0.001). Hs-cTnT increased stepwise and signitificantly according to clinical (NYHA stage) as well as functional (LV ejection fraction, fluid retention) severity (each p<0.001). At a binary cutpoint of 0.014 ng/mL, hs-TropT was a significant predictor of all-cause mortality and all-cause mortality or rehospitalization for congestive heart failure (each p≤0.01). Of note, the prognostic value of hs-TropT was independent and additive to that of NT-proBNP.
Hs-cTnT increases stepwise with the severity of symptoms and LV dysfunction and offers important prognostic information in chronic heart failure, independently from and additive to NT-proBNP. The utility of hs-cTnT expands beyond acute myocardial ischemia and towards chronic heart failure.
- SourceAvailable from: Matthew SherwoodJournal of the American Heart Association. 01/2014; 3(1):e000403.
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ABSTRACT: AXL is a membrane receptor tyrosine kinase highly expressed in the heart and has a conspicuous role in cardiovascular physiology. The role of AXL in heart failure (HF) has not been previously addressed. AXL protein was enhanced 6-fold in myocardial biopsies of end-stage HF patients undergoing heart transplantation compared to controls from heart donors (P<0.0001). Next, we performed a transversal study of patients with chronic HF (n=192) and a group of controls with no HF (n=67). sAXL and BNP circulating levels were quantified and clinical and demographic data were collected. sAXL levels in serum were higher in HF (86.3±2.0ng/mL) than in controls (67.8±2.0ng/mL; P<0.0001). Also, sAXL correlated with several parameters associated with worse prognosis in HF. Linear regression analysis indicated that serum creatinine, systolic blood pressure and atrial fibrillation, but not BNP levels, were predictive of sAXL levels. Cox regression analysis indicated that high sAXL values at enrollment time were related to the major HF events (all-cause mortality, heart transplantation and HF hospitalizations) at one year follow-up (P<0.001), adding predictive value to high BNP levels. Myocardial expression and serum concentration of AXL is elevated in HF patients compared to controls. Furthermore, peripheral sAXL correlates with parameters associated with the progression of HF and with HF events at short term follow-up. All together these results suggest that sAXL could belong to a new molecular pathway involved in myocardial damage in HF, independent from BNP.International journal of cardiology 03/2014; · 6.18 Impact Factor
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ABSTRACT: Prognosis permits clinicians to separate persons with heart failure (HF) into subgroups based on likely health outcomes. Treatment is partly guided by these likely outcomes. This systematic review explores whether brain natriuretic peptide (BNP) and N-terminal proBNP (NT-proBNP) are independent predictors of prognosis in persons with chronic stable HF. We electronically searched Medline, Embase, AMED, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, and CINAHL for English-language articles published between 1989 and mid-2012. We utilized trained reviewers and standardized forms to screen articles for inclusion and extracted data from included articles. All included studies were summarized in narrative and tabular form. We used the Hayden criteria to assess the risk of bias. Sixteen BNP publications and 88 NT-proBNP publications were included in the systematic review. BNP was positively associated with all-cause and HF mortality. NT-proBNP was positively associated with all-cause and cardiovascular mortality. BNP and NT-proBNP levels are useful for estimating prognosis in persons with chronic stable HF. Further research is required to establish optimal cutpoints and to assess whether prognostic effects differ by age, sex, or time period.Heart Failure Reviews 07/2014; · 4.45 Impact Factor