![]() For all the patients the blood cortisol level was measured four times during operation. Results: Serum cortisol levels decreased during operation in both groups, reaching 67.8% of the baseline in group I and 63.2% of the baseline in group II. The infusion of anesthetic drugs was guided by bispectral index in group I (n=38), and by clinical judgment in group II (n=38). ![]() The patients were divided into two groups. The aim of the present study was to measure the serum cortisol levels as an index of stress response in patients who are candidates for coronary artery bypass graft surgery in two groups of patients. Methods: Seventy-six patients who were scheduled for primary elective cardiopulmonary bypass were enrolled in a double–blind randomized study. Electroencephalographic monitoring by bispectral index is a guide to asses the depth of anesthesia. Background: Inadequate depth of anesthesia leads to release of stress hormones.
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