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Detection of perioperative myocardial ischaemia in cardiac surgery remains challenging, as current clinical bedside monitoring is insufficient in making proper diagnoses in real-time. Cellular metabolism gets altered during ischaemia and tissue PCO2 is produced in the course of buffering anaerobic lactic acidosis. Myocardial tissue PCO2 has been suggested as a parameter of ischaemia, but PCO2 measurement devices for routine clinical usage are lacking. Study aims were to (i) evaluate the diagnostic potential of PCO2 in early detection of localized myocardial metabolic changes, (ii) compare PCO2 obtained by novel conductometric PCO2 sensors (IscAlert) with fibre-optical sensors (Neurotrend), and (iii) investigate the relationship between myocardial PCO2, PO2 and parameters of energy consumption during regional myocardial ischaemia/reperfusion.

Perioperative detection of myocardial ischaemia/reperfusion with a novel tissue CO2 monitoring technology†