Internal carotid artery stenosis: comparison of duplex scan and magnetic resonance angiography with digital subtraction angiography
Arq. neuropsiquiatr
; 59(3B): 665-671, Sept. 2001. graf, tab
Article
en En
| LILACS
| ID: lil-295827
Biblioteca responsable:
BR1.1
ABSTRACT
OBJECTIVE:
We compare duplex scan (DS) and magnetic resonance angiography (MRA) with digital angiography (DGA) in respect to accuracy in measuring internal carotid artery (IC) stenosis in symptomatic patients.METHOD:
Ten symptomatic patients with IC stenosis greater than 70 percent previously diagnosed by DS were submitted to another DS and to both MRA and DGA. Both ICs from each patient (total 20 ICs) were evaluated by physicians blinded for the results of other tests. DS and MRA were compared with DGA, using the intraclass correlation coeficient (r) and its 95 percent confidence interval (95 percent ci). For each diagnostic test, the study group (20 Ics) was also divided in surgical patients (IC stenosis between 70 and 99 percent) and non surgical patients, using kappa concordance coeficient (k) to compare the results.RESULTS:
Main comparisons are DS and DGA, r = 0.71 (0.4 - 0.87); MRA and DGA, r = 0.61 (0.25 - 0.82). After division into surgical vs. non-surgical groups, k = 0.857 (p < 0.0001) between DS and DGA; and k = 0.545 (p = 0.003) between MRA and DGA. Most DS and MRA errors occurred in IC sub-occlusions.CONCLUSION:
The results suggest that when they are used together, DS and non-contrast MRA may substitute DGA in the evaluation of patients for IC stenosis surgery, except when there is discordance between their results or when the methods show sub-occlusive stenosis
Texto completo:
1
Colección:
01-internacional
Base de datos:
LILACS
Asunto principal:
Arteria Carótida Interna
/
Angiografía de Substracción Digital
/
Estenosis Carotídea
/
Ultrasonografía Doppler Dúplex
Tipo de estudio:
Observational_studies
/
Risk_factors_studies
Límite:
Adult
/
Aged80
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Arq. neuropsiquiatr
Asunto de la revista:
NEUROLOGIA
/
PSIQUIATRIA
Año:
2001
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Brasil