## Core Concept
Electroconvulsive Therapy (ECT) is a psychiatric treatment where seizures are induced in patients to provide relief from mental disorders. The duration of these seizures can vary, and prolonged seizures are a potential complication. Understanding the definition of prolonged seizures in the context of ECT is crucial for managing and preventing potential complications.

## Why the Correct Answer is Right
Prolonged seizures following ECT are generally defined as seizures that last more than 3 minutes. This duration is significant because seizures of this length can increase the risk of complications such as status epilepticus, physical injury, and cardiovascular strain. The threshold of 3 minutes is a guideline that helps clinicians decide when intervention is necessary to terminate the seizure.

## Why Each Wrong Option is Incorrect
- **Option A:** Less than 1 minute - This duration is typically considered within the normal range for ECT-induced seizures, which usually last from 30 seconds to 1 minute but can vary.
- **Option B:** More than 1 minute but less than 2 minutes - While longer than typical, this duration is not generally considered prolonged in the context of ECT.
- **Option C:** More than 5 minutes - Although prolonged, the specific threshold for defining prolonged seizures in ECT is more accurately represented by a shorter duration.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the American Psychiatric Association and other guidelines suggest that seizures lasting over 3 minutes are considered prolonged and may require intervention. Clinicians must be vigilant in monitoring seizure duration during ECT.

## Correct Answer: D. More than 3 minutes.