Biomarker Analysis
Plasma was collected by venous puncture at baseline (a median of 15.1 and 8.9 hours from onset of symptoms for patients with MINOCA and MI‐CAD, respectively) and after 1 month in a subset of paired patients and stored in aliquots in −70 °C until analysis. Baseline blood samples were obtained in all patients before coronary angiography. Biomarker concentrations were centrally measured at the Uppsala Clinical Research Center Laboratory (Uppsala, Sweden): hs‐cTnT, NT‐proBNP, and GDF‐15 were analyzed on Cobas Analytics Immunoanalyzers (Roche Diagnostics); and hs‐CRP was analyzed on the Architect platform (Abbott Diagnostics). All analyses were done according to the instructions of the assay manufacturers and have been described in detail previously.