II. Exam
- See Bruit
- Findings in which Carotid Bruit is more suggestive of significant carotid lesion
- Diastolic component is the only characteristic reliably specific for significant Carotid Bruit
- Carotid Bruit AND symptoms suggestive of Carotid Stenosis
- Degree of stenosis by atherosclerotic Plaque
- Minimum stenosis causing bruit: 50% (<3 mm lumen)
- Prolonged, high-pitched bruit: >75% (1.5 mm lumen)
- Location
- Plaque involves posterior wall of common carotid
- Affects bifurcation and flow into internal carotid
- Risk of distal thrombus formation in internal carotid
III. Differential Diagnosis
- Carotid Stenosis
- Cardiac Murmur transmission
- External Carotid Stenosis
- Venous Hum
- Tortuous Arteries
IV. Interpretation
- Carotid Bruit associated risk of stroke at 1 year
- Asymptomatic Carotid Bruit: 1% risk at 1 year
- Transient Ischemic Attack history: 1.7% risk
- Other studies question bruit significance
V. Efficacy
- Carotid Bruit has poor efficacy
- Test Sensitivity: 40% for those with >50% Carotid Stenosis
- False Positives: 10% with Carotid Bruits have <50% Carotid Stenosis
VI. References
- Brown (2017) Stroke and Cerebrovascular Disease Update, Mayo Clinical Reviews, Rochester
- Firnhaber (2022) Am Fam Physician 105(1): 65-72 [PubMed]
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Related Studies
| Concepts | Finding (T033) |
| SnomedCT | 419642000 |
| Spanish | soplo carotídeo (hallazgo), soplo carotídeo, Ruido carotídeo |
| Italian | Rumore carotideo |
| Japanese | 頚動脈雑音, ｹｲﾄﾞｳﾐｬｸｻﾞﾂｵﾝ |
| English | carotid bruit (physical finding), carotid bruit, artery bruits carotid, bruit carotid artery, Bruit;carotid, carotid artery bruit, carotid bruits, bruits carotid, artery bruit carotid, bruit carotid, Carotid bruit, Carotid bruit (finding) |
| Czech | Karotický šelest |
| Hungarian | Carotis zörej |
| Portuguese | Sopro carotídeo |
| Dutch | carotisgeruis |
| French | Souffle carotidien |
| German | Karotis-Geraeusch |
