- Levels of markers: cystatin C, cardiotrophin-1, metaloproteinases: MMP-2, MMP-7, MMP-8, MMP-9, Procollagen III N-Terminal Propeptide (PIIINP), Syndecan 4 (SDC4) and NT-proBNP Each patient will be informed about the objectives of the study and give written consent to participate.