Abstract
Objective: The laser speckle contrast imaging (LSCI) system is a method to evaluate microcirculation. The primary aim of our study
 is to evaluate the relationship between LSCI and perfusion markers in coronary artery bypass grafting (CABG). Our second aim is to
 investigate the relationship between LSCI and extubation time in the intensive care unit.
 Patients and Methods: Fifteen patients aged 43-80 years who will undergo on-pump CABG were included in the prospective study.
 Mean arterial pressure (mmHg), heart rate (min-1), PO2 (mmHg), PCO2 (mmHg) and lactate (mmol/L) levels were measured preinduction,
 post-induction, 10th minute of the extracorporeal circulation, post-crossclamp, and post-operatively. At the same time
 points, LSCI values from the skin were measured and recorded. The intubation times of the patients were also recorded.
 Results: There was no significant change in systemic tissue perfusion markers (P>0.05). LSCI perfusion values decreased significantly
 from induction and remained low until the end of surgery (P
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