In this first installment of the ECT series, I walk through the foundations of electroconvulsive therapy from the perspective of someone who practices it regularly in a busy clinical service. Despite decades of stigma and misunderstanding, ECT remains the most effective treatment in psychiatry for several severe and life-threatening conditions, and modern research has repeatedly demonstrated its safety.

I start with a brief history, from ECT’s origins in 1938, to how the modern procedure works: inducing a generalized tonic–clonic seizure under general anesthesia using a short electrical stimulus. I also review what we know from animal studies, neuroimaging, and post-mortem human data: there is no evidence that ECT causes brain damage. Instead, its side effects, especially anterograde and retrograde amnesia, appear to stem from neuroplastic changes rather than neuronal injury.

I then discuss the major indications for ECT:

* Severe unipolar and bipolar depression

* Psychotic depression

* Catatonia (one of the most dramatic responders)

* Acute exacerbations of schizophrenia or schizoaffective disorder

* Mania, though less commonly treated because manic patients often decline the procedure and involuntary ECT is rare.

I also explain why ECT is one of the safest procedures in medicine when performed properly. I describe the characteristic physiologic response: a brief parasympathetic surge during the stimulus (bradycardia or even a few seconds of asystole) immediately followed by a robust sympathetic surge during the seizure (often dramatic but transient increases in blood pressure and heart rate). I discuss when and how we pre-treat with labetalol, and why its mild anti-seizure effects require careful balancing.

Finally, I cover procedure-related complications and how we manage them: prolonged seizures, tardive seizures, anesthetic choices (methohexital, propofol, ketamine, etomidate), and the pros and cons of different paralytics such as succinylcholine and rocuronium with sugammadex.

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