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Introduction: Electroconvulsive therapy (ECT) is rarely practiced in Tunisia. We have tried to explain this lack of use by studying theoretical knowledge, the perception and the attitudes of health professionals towards ECT., Methods: We conducted a survey in the region of Sfax in Tunisia. It included 120 participants. The latter were divided into four groups, composed of 30 members, in order to compare them: group 1 (psychiatrists); group 2 (neurologists and anaesthetists); group 3 (psychiatric nurses); group 4 (paramedics in the neurological and anaesthesia wards). The surveyed people answered an auto-questionnaire including essentially 16 items: 11 had binary answers (true or false) related to theoretical knowledge about ECT, and five others explored the perception and attitudes concerning this therapy., Results: Concerning the items exploring theoretical knowledge, 67.5% of people were not able to answer, in conformity with the consensual scientific data, a minimum of 75% questions. The rates were significantly lower among the paramedics (P<0.001) and those who work outside the psychiatric wards (P=0.003). The answers of psychiatric caregivers were less frequently incorrect compared to those of non psychiatric ward workers. The latter more frequently thought that the psychiatrists easily resorted to ECT (P=0.003). The paramedics perceived, more frequently than doctors, the ECT as a violent therapeutic means (P=0.001), and more frequently refused to give their consent to apply ECT to a relative (P=0.044). The rate of doctors who refused to give their consent to apply ECT to a relative was statistically higher in group 2 than in group 1 (P=0.017). Doctors with higher scores in theoretical knowledge, consent more frequently to apply ECT to a member of their families (P=0.001)., Discussion: The comparison of theoretical knowledge between the two groups of doctors (group 1 versus group 2) revealed significantly more frequent incorrect answers among non-psychiatrists. The latter more frequently had erroneous ideas: that ECT was performed without anaesthesia; that it wasn't possible to apply it to pregnant women, nor to people suffering from Parkinson's disease, nor as a preventive treatment of recurrence, and that the vital risk was higher with ECT than medical treatments. Compared to the caregivers of group 3, group 4 had significantly more frequent negative attitudes toward ECT; concerning the application without anaesthesia, the lack of tolerance and the over-mortality rate related to ECT. This therapy seems to create an apprehension and a reticence among health professionals, mainly the paramedics and the non-psychiatrists. The lack of valid scientific knowledge concerning ECT allows prejudiced ideas to tarnish the image of this therapy., Conclusion: Information and training would play a primordial role in the improvement of the perception and attitudes concerning ECT, and lower the reticence towards this therapy, which in spite of its proven efficacy, always maintains a pejorative image., (Copyright © 2011 L’Encéphale, Paris. Published by Elsevier Masson SAS. All rights reserved.)