| Popis: |
Ophthalmodynamometry was performed on 100 patients with amaurosis fugax or transient cerebral ischemic attacks to determine its value in identifying significant (over 50%) carotid stenosis as verified by angiography. Of three criteria for an abnormal result of ophthalmodynamometry a corrected systolic pressure of 70 mm Hg or less had the highest sensitivity (95%) and overall accuracy (88%) in identifying significant carotid stenosis. However, with the use of all three criteria, only one of which had to be met in an individual case, ophthalmodynamometry still identified significant carotid obstruction with 80% sensitivity, 78% accuracy and a false-positive rate of 25%. Thus, ophthalmodynamometry appears to be just as useful as any of the more expensive and complicated noninvasive tests for carotid stenosis currently available. |
