期刊
NEUROPSYCHIATRIC DISEASE AND TREATMENT
卷 14, 期 -, 页码 1437-1450出版社
DOVE MEDICAL PRESS LTD
DOI: 10.2147/NDT.S157233
关键词
ketamine; ECT; anesthesia; major depressive disorder
资金
- Janssen
- Pfizer
- Eli Lilly
- Astra Zeneca
- Glaxo Smith Kline
- Lundbeck
- Bristol Myers Squibb
- Hoffmann la Roche
- Sunovion
- Mylan
- Paladin
- Boehringer Ingelheim
- Otsuka
- HLS
- Allergan
- Novartis
Up to 20% of depressed patients demonstrate treatment resistance to one or more adequate antidepressant trials, resulting in a disproportionately high burden of illness. Ketamine is a non-barbiturate, rapid-acting general anesthetic that has been increasingly studied in treatment resistant depression (TRD), typically at sub-anesthetic doses (0.5 mg/kg over 40 min by intravenous infusion). More recent data suggest that ketamine may improve response rates to electroconvulsive therapy (ECT) when used as an adjunct, but also as a sole agent. In the ECT setting, a dose of 0.8 mg/kg or greater of ketamine demonstrates improved reduction in depressive symptoms than lower doses; however, inconsistency and significant heterogeneity among studies exists. Clinical predictors of responses to ketamine have been suggested in terms of non-ECT settings. Ketamine does increase seizure duration in ECT, which is attenuated when concomitant barbiturate anesthetics are used. However, most studies are small, with considerable heterogeneity of the sample population and variance in dosing strategies of ketamine, ECT, and concomitant medications, and lack a placebo control, which limits interpretation. Psychotomimetic and cardiovascular adverse effects are reported with ketamine. Cardiovascular adverse effects are particularly relevant when ketamine is used in an ECT setting. Adverse effects may be mitigated with concurrent propofol; however, this adds complexity and cost compared to standard anesthesia. Long-term adverse effects are still unknown, but relevant, given recent class concerns for anesthetic and sedative agents.
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