Circulating cardiac
troponin T is a marker of cardiomyocyte injury, and predicts adverse outcomes in patients with chronic
heart failure. However, the significance of highly sensitive cardiac
troponin T (hs-
TnT) in cardiac dysfunction remains uncertain. The purpose of this study is to evaluate the correlation between hs-
TnT and echocardiographic parameters or
natriuretic peptides in patients with
heart failure.
METHODS AND RESULTS: We analyzed 283 consecutive out- or in-patients who had
B-type natriuretic peptide (BNP) ≥20 pg/mL and were examined by echocardiography (mean age 66.5±13.9 years old; 159 males). Hs-
TnT, BNP,
N-terminal pro-BNP (
NT-proBNP), and
creatinine levels were measured simultaneously. LVEDD (left ventricular end-diastolic dimension), LVEF (left ventricular ejection fraction), E', E/E', left ventricular (LV) Tei index, and right ventricular (RV) Tei index were determined with echocardiography. The linear regression analyses demonstrated that loghs-
TnT correlated with LVEDD (R=0.242, p<0.0001), LVEF (R=-0.369, p<0.0001), E' (R=-0.447, p<0.0001), E/E' (R=0.364, p<0.0001), LV Tei index (R=0.303, p<0.0001), RV Tei index (R=0.443, p<0.0001), and estimated glomerular filtration rate (eGFR) (R=-0.489, p<0.0001). Using multiple variable regression analysis, loghs-
TnT independently correlated with LVEF, E/E', RV Tei index, and eGFR. Furthermore, loghs-
TnT significantly correlated with logBNP (R=0.567, p<0.0001) or logNT-proBNP (R=0.647, p<0.0001). Multiple variable regression analysis demonstrated that loghs-
TnT independently correlated with logBNP, age, and eGFR, or with logNT-proBNP, age, sex, and eGFR.
CONCLUSIONS: