Clinical trials

The goal of this observational study is to test in the safety and performance of intraoperative myocardial spectroscopic measurement in open-heart surgery patients The main questions it aims to answer are: * The Devices can record myocardial spectrometric data for analysis, and * How these measures correlate with the occurring events, procedures, and clinical parameters during the operation. * Number of participants with device-related adverse events as assessed by CTCAE v4.0