Accuracy of a Novel Risk Index Combining Degree of Stenosis of the Carotid Artery and Plaque Surface Echogenicity
2012; Lippincott Williams & Wilkins; Volume: 43; Issue: 5 Linguagem: Inglês
10.1161/strokeaha.111.634766
ISSN1524-4628
AutoresIsabelle Momjian‐Mayor, Igor Kuzmanović, Shahan Momjian, Christophe Bonvin, Stefane Albanese, Denis Bichsel, Mario Comelli, Vitor Augusto da Rosa Pereira, Karl‐Olof Lövblad, Roman Sztajzel,
Tópico(s)Intracranial Aneurysms: Treatment and Complications
ResumoThe purpose of this study was to determine the accuracy of a risk index in symptomatic or asymptomatic carotid stenoses.Consecutive patients presenting 50% to 99% carotid stenoses were included. A semiautomated gray scale-based color mapping (red, yellow, and green) of the whole plaque and of its surface was achieved. Surface was defined as the region located between the lumen (Level 0) and, respectively, 0.5, 1, 1.5, and 2 mm. Risk index was based on a combination of degree of stenosis and the proportion of the red color (reflecting low echogenicity) on the surface or on the whole plaque.There were 67 (36%) symptomatic and 117 (64%) asymptomatic carotid stenoses. Risk index values were higher among symptomatic stenoses (0.46 mean versus 0.29; P 0.36 (sensitivity and specificity of 78% and 65%, respectively).Risk index was significantly higher in the presence of symptoms and could therefore be a valuable tool to assess the clinical risk of a carotid plaque.
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