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Effect of coronary atherosclerosis and myocardial ischemia on plasma levels of high-sensitivity Troponin T and NT-proBNP in patients with stable angina


Caselli, Chiara; Prontera, Concetta; Liga, Riccardo; De Graaf, Michiel A; Gaemperli, Oliver; Lorenzoni, Valentina; Ragusa, Rosetta; Marinelli, Martina; Del Ry, Silvia; Rovai, Daniele; Giannessi, Daniela; Aguadé-Bruix, Santiago; Clemente, Alberto; Bax, Jeroen J; Lombardi, Massimo; Sicari, Rosa; Zamorano, José; Scholte, Arthur J; Kaufmann, Philipp A; Knuuti, Juhani; Underwood, S Richard; Clerico, Aldo; Neglia, Danilo (2016). Effect of coronary atherosclerosis and myocardial ischemia on plasma levels of high-sensitivity Troponin T and NT-proBNP in patients with stable angina. Arteriosclerosis, Thrombosis, and Vascular Biology, 36(4):757-764.

Abstract

OBJECTIVE: Circulating levels of high-sensitivity cardiac troponin T (hs-cTnT) and N terminal probrain natriuretic peptide (NT-proBNP) are predictors of prognosis in patients with coronary artery disease (CAD). We aimed at evaluating the effect of coronary atherosclerosis and myocardial ischemia on cardiac release of hs-cTnT and NT-proBNP in patients with suspected CAD.
APPROACH AND RESULTS: Hs-cTnT and NT-proBNP were measured in 378 patients (60.1±0.5 years, 229 males) with stable angina and unknown CAD enrolled in the Evaluation of Integrated Cardiac Imaging (EVINCI) study. All patients underwent stress imaging to detect myocardial ischemia and coronary computed tomographic angiography to assess the presence and characteristics of CAD. An individual computed tomographic angiography score was calculated combining extent, severity, composition, and location of plaques. In the whole population, the median (25-75 percentiles) value of plasma hs-cTnT was 6.17 (4.2-9.1) ng/L and of NT-proBNP was 61.66 (31.2-132.6) ng/L. In a multivariate model, computed tomographic angiography score was an independent predictor of the plasma hs-cTnT (coefficient 0.06, SE 0.02; P=0.0089), whereas ischemia was a predictor of NT-proBNP (coefficient 0.38, SE 0.12; P=0.0015). Hs-cTnT concentrations were significantly increased in patients with CAD with or without myocardial ischemia (P<0.005), whereas only patients with CAD and ischemia showed significantly higher levels of NT-proBNP (P<0.001).
CONCLUSIONS: In patients with stable angina, the presence and extent of coronary atherosclerosis is related with circulating levels of hs-cTnT, also in the absence of ischemia, suggesting an ischemia-independent mechanism of hs-cTnT release. Obstructive CAD causing myocardial ischemia is associated with increased levels of NT-proBNP.

Abstract

OBJECTIVE: Circulating levels of high-sensitivity cardiac troponin T (hs-cTnT) and N terminal probrain natriuretic peptide (NT-proBNP) are predictors of prognosis in patients with coronary artery disease (CAD). We aimed at evaluating the effect of coronary atherosclerosis and myocardial ischemia on cardiac release of hs-cTnT and NT-proBNP in patients with suspected CAD.
APPROACH AND RESULTS: Hs-cTnT and NT-proBNP were measured in 378 patients (60.1±0.5 years, 229 males) with stable angina and unknown CAD enrolled in the Evaluation of Integrated Cardiac Imaging (EVINCI) study. All patients underwent stress imaging to detect myocardial ischemia and coronary computed tomographic angiography to assess the presence and characteristics of CAD. An individual computed tomographic angiography score was calculated combining extent, severity, composition, and location of plaques. In the whole population, the median (25-75 percentiles) value of plasma hs-cTnT was 6.17 (4.2-9.1) ng/L and of NT-proBNP was 61.66 (31.2-132.6) ng/L. In a multivariate model, computed tomographic angiography score was an independent predictor of the plasma hs-cTnT (coefficient 0.06, SE 0.02; P=0.0089), whereas ischemia was a predictor of NT-proBNP (coefficient 0.38, SE 0.12; P=0.0015). Hs-cTnT concentrations were significantly increased in patients with CAD with or without myocardial ischemia (P<0.005), whereas only patients with CAD and ischemia showed significantly higher levels of NT-proBNP (P<0.001).
CONCLUSIONS: In patients with stable angina, the presence and extent of coronary atherosclerosis is related with circulating levels of hs-cTnT, also in the absence of ischemia, suggesting an ischemia-independent mechanism of hs-cTnT release. Obstructive CAD causing myocardial ischemia is associated with increased levels of NT-proBNP.

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Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Nuclear Medicine
04 Faculty of Medicine > University Hospital Zurich > Clinic for Cardiology
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:11 February 2016
Deposited On:01 Mar 2016 17:59
Last Modified:27 Apr 2017 07:46
Publisher:Lippincott Williams & Wilkins
ISSN:1079-5642
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1161/ATVBAHA.115.306818
PubMed ID:26868212

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