High sensitivity troponin T and I reflect mitral annular plane systolic excursion being assessed by cardiac magnetic resonance imaging

Michèle Natale, Michael Behnes, Seung-Hyun Kim, Julia Hoffmann, Nadine Reckord, Ursula Hoffmann, Johannes Budjan, Siegfried Lang, Martin Borggrefe, Theano Papavassiliu, Thomas Bertsch, Ibrahim Akin

This study aims to evaluate the association between high sensitivity troponins (hsTn) and mitral annular plane systolic excursion (MAPSE) in patients undergoing cardiac magnetic resonance imaging (cMRI). Patients undergoing cMRI were prospectively enrolled. Patients with right ventricular dysfunction (< 50%) were excluded. Blood samples for measurements of hsTn and amino-terminal pro-brain natriuretic peptide (NT-proBNP) were collected at the time of cMRI. 84 patients were included. Median left ventricular ejection fraction was 59% (IQR 51-64%). HsTn were correlated inversely with MAPSE within multivariable linear regression models (hsTnI: Beta - 0.19; T - 1.96; p = 0.05; hsTnT: Beta - 0.26; T - 3.26; p = 0.002). HsTn increased significantly according to decreasing stages of impaired MAPSE (p < 0.003). HsTn discriminated patients with impaired MAPSE < 11 mm (hsTnT: AUC = 0.67; p = 0.008; hsTnI: AUC = 0.64; p = 0.03) and < 8 mm (hsTnT: AUC = 0.79; p = 0.0001; hsTnI: AUC = 0.75; p = 0.001) and were still significantly associated in multivariable logistic regression models with impaired MAPSE < 11 mm (hsTnT: OR = 4.71; p = 0.002; hsTnI: OR = 4.22; p = 0.009). This study demonstrates that hsTn are able to reflect MAPSE being assessed by cMRI.