# The ECG shows characteristic ______ changes in the precordial leads, suggesting acute pericarditis.

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=168424  
> language: ko  
> subject: Diseases of the circulatory system

## 문제

The ECG shows characteristic ______ changes in the precordial leads, suggesting acute pericarditis.

## 보기

1. diffuse **✔ 정답**
2. focal
3. localized
4. regional
5. segmental

**정답: 1**

## 해설

Diffuse ST-segment changes across multiple precordial leads are characteristic of acute pericarditis. This widespread pattern helps distinguish it from localized changes seen in myocardial infarction or ischemia.

## 임상 시나리오

ECG Changes in Acute Pericarditis:
- Diffuse ST elevation in multiple leads (typically concave up)
- PR segment depression
- Absence of reciprocal ST depression
- Four stages of ECG evolution:
1. Diffuse ST elevation, PR depression
2. ST segments return to baseline
3. T wave inversion
4. ECG returns to normal

Key Differentiating Features:
- Widespread involvement vs localized changes
- ST elevation in both limb and precordial leads
- Spares aVR and V1
- PR depression (especially in lead II)
- Preserved R wave progression
- No Q waves

Clinical Associations:
- Viral infections
- Post-myocardial injury
- Autoimmune conditions
- Uremia
- Neoplastic disease
- Post-cardiac surgery

## 핵심 개념

- **diffuse** — Spread out over a large area or throughout; not concentrated in one specific location
- **focal** — Limited to or affecting a specific point or small area
- **localized** — Restricted or confined to a particular place or specific area
- **regional** — Pertaining to or affecting a particular region or area of the body
- **segmental** — Relating to or affecting a segment or specific section of an organ or structure

## 같은 주제 문제

- [The patient's EKG shows significant ST ______ in leads V2 through V4, suggesting acute ant…](https://mymerci.kr/pages/nclex_q.php?qn_id=168328)
- [Patient presents with ______ angina not responding to sublingual nitroglycerin.](https://mymerci.kr/pages/nclex_q.php?qn_id=168343)
- [Patient's telemetry shows ______ rhythm with a rate of 150, requiring immediate cardiovers…](https://mymerci.kr/pages/nclex_q.php?qn_id=168345)
- [Echo shows severe ______ regurgitation requiring valve replacement.](https://mymerci.kr/pages/nclex_q.php?qn_id=168361)
- [MRI shows acute ______ stroke in the left MCA territory.](https://mymerci.kr/pages/nclex_q.php?qn_id=168366)
- [In hypertensive crisis, the patient shows severely elevated ______ pressure, often exceedi…](https://mymerci.kr/pages/nclex_q.php?qn_id=168375)
- [During cardiac auscultation, the nurse hears an abnormal heart sound between S1 and S2, in…](https://mymerci.kr/pages/nclex_q.php?qn_id=168376)
- [The patient's ECG shows a ______ rhythm with no discernible P waves and an irregularly irr…](https://mymerci.kr/pages/nclex_q.php?qn_id=168377)

---

More free questions: [기출문제](https://mymerci.kr/)

_학습 참고용입니다. 실제 임상은 최신 지침과 소속 기관 프로토콜을 따르세요._