# The patient shows ______ waves in the neck veins during cardiac examination, indicating tricuspid regurgitation.

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> url: https://mymerci.kr/pages/nclex_q.php?qn_id=168413  
> language: ko  
> subject: Diseases of the circulatory system

## 문제

The patient shows ______ waves in the neck veins during cardiac examination, indicating tricuspid regurgitation.

## 보기

1. cannon **✔ 정답**
2. jugular
3. venous
4. prominent
5. visible

**정답: 1**

## 해설

Cannon waves in the jugular veins are large, prominent pulsations that occur when the right atrium contracts against a closed tricuspid valve. These waves are commonly seen in tricuspid regurgitation and indicate significant right-sided heart dysfunction.

## 임상 시나리오

Cannon Waves:
- Abnormal pulsations in jugular veins
- Occur when right atrium contracts against closed tricuspid valve
- Associated with AV dissociation
- Visible in conditions: tricuspid regurgitation, complete heart block
- Key physical finding in cardiac examination
- Amplitude increases with severity of regurgitation
- Best observed with patient at 45-degree angle
- Other names: a-waves, atrial waves
- Diagnostic significance in heart failure
- Differentiated from normal jugular venous pulsations
- Often accompanied by hepatojugular reflux
- Indicates elevated right atrial pressure
- Common in ventricular tachycardia
- May present with neck vein distention
- Requires careful neck examination technique

## 핵심 개념

- **cannon** — Large, forceful pulsations in the neck veins that occur when the right atrium contracts against a closed tricuspid valve
- **jugular** — Relating to the neck or throat, specifically referring to the major veins in the neck that carry blood from the head back to the heart
- **venous** — Relating to or contained within veins; pertaining to the blood vessels that carry deoxygenated blood back to the heart
- **prominent** — Standing out or projecting beyond a surface; easily noticeable or conspicuous
- **visible** — Able to be seen or perceived by the eye; apparent or discernible to visual inspection

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