Regional Cerebral Oxygen Saturation During Electroconvulsive Therapy

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Abstract
Electroconvulsive therapy (ECT) increases neuronal energy consumption and alters systemic hemodynamics.We examined the effects of ECT on regional cerebral oxygen saturation (rSO2) using a near-infrared spectrophotometer. Heart rate (HR), mean arterial blood pressure (MAP), and rSO2 were continuously monitored throughout ECT under general anesthesia in 43 patients. In all subjects, rSO2 changed in a consistent pattern during ECT, initially decreasing (-9.4% +/- 0.9%) just after application of the electrical current and subsequent increasing (8.7% +/- 0.9%) beyond the pre-ECT value. A close correlation was demonstrated between the increase in rSO2 and the mean blood pressure after the electrical shock (r2 = 0.832, P (Anesth Analg 1996;83:726-30)