<prompt> Maximum benefit from ECT is seen inHysteriaDepression with suicidal tendencyChronic schizophreniaMania  <response>: Lucio Bini and Ugo Cerletti introduced ECT in 1938 for the treatment of psychiatric illness Indications for the Use of Electroconvulsive Therapy ECT Diagnostic Indications Clinical indications Major aMajor depression, both unipolar and bipolarbPsychotic depression in paicularMania, including mixed episodescSchizophrenia with acute exacerbation dCatatonic subtype paicularly Schizoaffective disorder Primary use Rapid definitive response required Risks of alternative treatments outweigh benefitsPast ho poor response to drugsgood response to ECTPatient preference Other Secondary use aParkinsons disease bNeuroleptic malignant disorder Failure to respond to pharmacotherapy in the current episodeIntolerance of pharmacotherapy in the current episodeRapid definitive response necessitated by deterioration of the patients condition this is one of the repeated questions in psychiatry you always have to carefully read all the choices if the choice has depression with suicidal ideas , that is the answer if depression with suicidalideas is not given in the choice , then search for catatonia if catatonia is also not in the choice then go for treatment resistant schizophrenia and mania in PGI queestion paper where there are multiple answers for a single question, you can select all these choices namely depression with suicidal ideas catatonia treatment resistant mania and schizophrenia Ref: P.3290 chap. 31.34a Electroconvulsive Therapy 