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Supplementary Material for: An hs-TNT Second Peak Associated with High CRP at Day 2 Appears as Potential Biomarkers of Micro-Vascular Occlusion on Magnetic Resonance Imaging after Reperfused ST-Segment Elevation Myocardial Infarction

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posted on 2018-08-23, 13:40 authored by Huet F., Akodad M., Kuster N., Kovacsik H., Leclercq F., Dupuy A.-M., Gervasoni R., Khoury G., Macia J.C., Cristol J.-P., Roubille F.
Introduction: Micro-vascular occlusion (MVO) in a myocardial infarction (MI) is associated with an increased risk of heart failure and mortality. Hs-T-troponin has a double peak kinetic after MI. The aim was to determine if this kinetic was correlated to MVO evaluated by cardiac magnetic resonance imaging (MRI) after MI. Methods: This is a monocentric retrospective study. Inclusion criteria were hospitalization for MI, Thrombolysis In Myocardial Infarction flow 0 at coronary angiography, reperfusion within 12 h from the onset of chest pain, cardiac MRI within the first month, and a 5-days’ biological follow-up with at least hs-T-Troponin and C-reactive protein (CRP). Statistics were performed using the R software. Results: Ninety-eight patients were included. Fifty-three patients (54.1%) had MVO at MRI. The existence of MVO was associated with a trend of more kissing procedure during primary percutaneous coronary intervention (p = 0.06), a significantly more frequent second peak of troponin (p = 0.048), a significantly higher CRP level (p < 0.0001) and a longer time to balloon (p = 0.01). The association of CRP level above 40 mg/L at day 2 and the observation of a second peak of troponin were associated to 95% of MVO in ST-segment elevation MI patients. By contrast, in the absence of these 2 criteria, MVO was absent in 78% of the cases. This score was associated with a higher rate of hospitalisation at 2 years. Conclusion: A biological score integrating hs-TNT second peak and CRP might help to predict MVO and predict outcomes after reperfused MI in our population.

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