# Situation: A 58-year-old woman with severe major depressive disorder with psychotic features has refused most food and fluids for 4 days and is scheduled for a course of electroconvulsive therapy (ECT) with right unilateral electrode placement. She has controlled hypertension and no cardiac, neurologic, or pulmonary disease. She has given written informed consent. Glycopyrrolate is ordered to be given before the anesthetic at each treatment. What is the purpose of this drug?

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=630006  
> language: ko  
> subject: Nursing Practice V — Care of Clients with Maladaptive Patterns of Behavior; Care of Clients with Life-Threatening Conditions, Acute Multi-Organ Problems, High Acuity and Emergency Situations

## 문제

Situation: A 58-year-old woman with severe major depressive disorder with psychotic features has refused most food and fluids for 4 days and is scheduled for a course of electroconvulsive therapy (ECT) with right unilateral electrode placement. She has controlled hypertension and no cardiac, neurologic, or pulmonary disease. She has given written informed consent.

Glycopyrrolate is ordered to be given before the anesthetic at each treatment. What is the purpose of this drug?

## 보기

1. To lower the seizure threshold so less current is needed
2. To relax skeletal muscles so that fractures do not occur
3. To dry secretions and prevent vagal slowing of the heart **✔ 정답**
4. To blunt the rise in blood pressure during the seizure

**정답: 3**

## 해설

An anticholinergic (glycopyrrolate or atropine) is given before ECT to reduce oral and airway secretions, lowering aspiration risk, and to prevent the brief vagal bradycardia or asystole that occurs at the moment of the electrical stimulus. Muscle relaxation, anesthesia, and blood pressure control are provided by other drugs.

## 심화 해설

Purpose of Glycopyrrolate Before ECT

The correct answer is 3. To dry secretions and prevent vagal slowing of the heart.

Glycopyrrolate is an anticholinergic agent that is routinely administered before electroconvulsive therapy. Its clinical role in this setting is twofold and directly addresses two predictable physiological responses to the procedure.

First, the electrical stimulus delivered during ECT triggers an immediate, brief surge of parasympathetic outflow through the vagus nerve. This can produce transient bradycardia or even a few seconds of asystole at the exact moment the current is applied. Because glycopyrrolate blocks muscarinic acetylcholine receptors, it blunts this vagal response and helps maintain an adequate heart rate during stimulus delivery. The anticholinergic effect is what prevents the brief vagal slowing of the heart that occurs at the moment of the electrical stimulus.

Second, glycopyrrolate reduces oral and airway secretions. During the brief period of anesthesia and the induced seizure, the patient cannot protect the airway effectively. Excess saliva or respiratory secretions increase the risk of aspiration and can complicate airway management. By drying these secretions, glycopyrrolate lowers that risk.

Watch out! Glycopyrrolate does not lower the seizure threshold, relax skeletal muscles, or blunt the hypertensive response. Those effects are achieved by other agents given as part of the ECT anesthetic regimen.

| Drug or Agent | Primary Purpose in ECT |
| --- | --- |
| Glycopyrrolate (anticholinergic) | Dries secretions and prevents vagal bradycardia/asystole |
| Succinylcholine (muscle relaxant) | Relaxes skeletal muscles to prevent fractures and soft tissue injury during the seizure |
| Methohexital or propofol (anesthetic) | Produces brief unconsciousness so the patient does not experience the seizure |
| Beta-blocker or other antihypertensive (e.g., labetalol, esmolol) | Blunts the sympathetic surge and rise in blood pressure during the seizure |

In this patient, the order for glycopyrrolate before the anesthetic is consistent with standard ECT practice. She has controlled hypertension and no cardiac, neurologic, or pulmonary disease, so the anticholinergic is used primarily for its routine protective effects on heart rate and secretions rather than for any specific comorbidity. Muscle relaxation, anesthesia, and blood pressure control are provided by separate drugs, not by glycopyrrolate.

Key point! When a question asks about a pre-ECT anticholinergic, the expected answer almost always involves two linked actions: reducing secretions and preventing vagal-induced bradycardia. The other options describe the roles of entirely different medication classes.

## 임상 시나리오

Pre-ECT Anticholinergic UseWhy glycopyrrolate is given before the anesthetic
Glycopyrrolate is an anticholinergic given before ECT to dry oral and airway secretions, reducing aspiration risk during anesthesia and seizure.

It also blocks the vagal response triggered by the electrical stimulus, preventing transient bradycardia or asystole at the moment of current delivery.

CautionGlycopyrrolate does not lower the seizure threshold, relax skeletal muscles, or control the hypertensive surge. Those roles belong to anesthetics, neuromuscular blockers, and antihypertensive agents.

## 핵심 개념

- **Glycopyrrolate** — An anticholinergic agent used before ECT to reduce oral/airway secretions and prevent vagal bradycardia.
- **Vagal bradycardia** — A transient parasympathetic response triggered by the ECT electrical stimulus, which can cause a brief drop in heart rate or asystole.
- **Anticholinergic** — A drug class that blocks muscarinic acetylcholine receptors, reducing secretions and parasympathetic effects.
- **Electroconvulsive therapy (ECT)** — A procedure using electrical stimulation to induce a therapeutic seizure, often for severe depression.
- **Aspiration risk** — The danger of inhaling oral or gastric contents into the airway, increased during anesthesia and seizure.

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