Quest for the Vulnerable Atheroma: Carotid Stenosis and Diametric Strain--A Feasibility Study.
Ultrasound Med Biol
; 42(3): 699-716, 2016 Mar.
Article
em En
| MEDLINE
| ID: mdl-26705891
ABSTRACT
The Bernoulli effect may result in eruption of a vulnerable carotid atheroma, causing a stroke. We measured electrocardiography (ECG)-registered QRS intra-stenotic blood velocity and atheroma strain dynamics in carotid artery walls using ultrasonic tissue Doppler methods, providing displacement and time resolutions of 0.1 µm and 3.7 ms. Of 22 arteries, 1 had a peak systolic velocity (PSV) >280 cm/s, 4 had PSVs between 165 and 280 cm/s and 17 had PSVs <165 cm/s. Eight arteries with PSVs <65 cm/s and 4 of 9 with PSVs between 65 and 165 cm/s had normal systolic diametric expansion (0% and 7%) and corresponding systolic wall thinning. The remaining 10 arteries had abnormal systolic strain dynamics, 2 with diametric reduction (>-0.05 mm), 2 with extreme wall expansion (>0.1 mm), 2 with extreme wall thinning (>-0.1 mm) and 4 with combinations. Decreases in systolic diameter and/or extreme systolic arterial wall thickening may indicate imminent atheroma rupture.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Estenose das Carótidas
/
Técnicas de Imagem por Elasticidade
/
Imagem de Perfusão
/
Placa Aterosclerótica
Tipo de estudo:
Diagnostic_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article