Assessment of coronary stents by 64-slice computed tomography: in-stent lumen visibility and patency / 中国医学科学杂志(英文版)
Chinese Medical Sciences Journal
;
(4): 156-160, 2009.
Article
Dans Anglais
| WPRIM
| ID: wpr-302629
ABSTRACT
<p><b>OBJECTIVE</b>To assess lumen visibility of coronary stents by 64-slice computed tomography (CT) coronary angiography, and determine the value of 64-slice CT in non-invasive detecting of in-stent restenosis after coronary artery stent implantation.</p><p><b>METHODS</b>Totally, 60 patients (54 males, aged 57.0+/-12.7 years) and 105 stents were investigated by 64-slice CT at a mean interval of 20.0+/-16.6 months after coronary stents implantation. Axial multi-planar reconstruction images of the stents and curved-planar reconstruction images through the median of the stents were reconstructed for evaluating stent image quality on a 5-point scale (1=excellent, 5=non-assessable), and stent lumen diameter was detected. Conventional coronary angiography was performed in 18 patients, and 32 stents were evaluated.</p><p><b>RESULTS</b>Image quality was good to excellent on average (score 1.71+/-0.76). Stent image quality score was correlated to heart rate (r=0.281, P<0.01) and stent diameter (r=-0.480, P<0.001). All the stents were assessable in lumen visibility with an average visible lumen diameter percentage of 60.7%+/-13.6%. Visible lumen diameter percentage was correlated to heart rate (r=-0.193, P<0.05), stent diameter (r=0.403, P<0.001), and stent image quality score (r=-0.500, P<0.001). Visible lumen diameter percentage also varied depending on the stent type. In comparison with the conventional coronary angiography, 4 of 6 in-stent stenoses were correctly detected. The sensitivity and specificity for the detection of in-stent stenosis were 66.7% and 84.6%, respectively.</p><p><b>CONCLUSIONS</b>Using a 64-slice CT, the stent lumen is partly visible in most of the stents. And 64-slice CT may be useful in the assessment of stent patency.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Thérapeutique
/
Imagerie diagnostique
/
Interprétation d'images radiographiques assistée par ordinateur
/
Tomodensitométrie
/
Angioplastie coronaire par ballonnet
/
Études rétrospectives
/
Sténose coronarienne
/
Endoprothèses à élution de substances
Type d'étude:
Etude diagnostique
/
Étude observationnelle
Limites du sujet:
Adulte
/
Adulte très âgé
/
Femelle
/
Humains
/
Mâle
langue:
Anglais
Texte intégral:
Chinese Medical Sciences Journal
Année:
2009
Type:
Article
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