# ECG showed _____, an irregular heart rhythm often associated with increased risk of stroke.

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> url: https://mymerci.kr/pages/nclex_q.php?qn_id=168474  
> language: ko  
> subject: Diseases of the circulatory system

## 문제

ECG showed _____, an irregular heart rhythm often associated with increased risk of stroke.

Source: Scene from Grey's Anatomy Season 5, Episode 7

## 보기

1. arrhythmia **✔ 정답**
2. tachycardia
3. bradycardia
4. hypertension
5. hypotension

**정답: 1**

## 해설

Arrhythmia, particularly atrial fibrillation, is an abnormal heart rhythm where the heart beats irregularly and often rapidly. The irregular beating can lead to blood clots forming in the heart, increasing stroke risk. Common symptoms include palpitations, fatigue, dizziness, and shortness of breath. Treatment may include medications, cardioversion, or ablation procedures.

## 임상 시나리오

ECG (Electrocardiogram)
- Records electrical activity of heart
- Shows heart rhythm, rate, conduction abnormalities
- P waves, QRS complex, T waves

Types of Arrhythmia:
1. Atrial Fibrillation (AF)
- Irregular atrial contractions
- Risk factors: age, hypertension, heart disease
- Symptoms: palpitations, fatigue, dizziness

2. Tachycardia
- Heart rate >100 beats/minute
- Types: SVT, VT
- Treatment: medications, cardioversion

3. Bradycardia
- Heart rate

## 핵심 개념

- **arrhythmia** — An abnormal heart rhythm where the heartbeat is irregular, either too fast, too slow, or erratic. It can lead to blood clots and increased risk of stroke.
- **tachycardia** — A condition where the heart beats faster than normal, typically over 100 beats per minute at rest, which can cause palpitations and shortness of breath.
- **bradycardia** — A slower than normal heart rate, typically less than 60 beats per minute, which can cause fatigue, dizziness, and shortness of breath.
- **hypertension** — High blood pressure condition where the force of blood against artery walls is consistently too high, increasing risk of heart disease and stroke.
- **hypotension** — Low blood pressure condition where blood pressure is lower than normal, which can cause dizziness, fainting, and fatigue.

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