Carotid ultrasonography (ALOKA ProSound SSD-alpha10) was performed in 31 CI patients and 38 control subjects, and the 尾 value of the bilateral common carotid artery at 2.0 cm proximal to the bifurcation was measured using the echo-tracking method. The relationship between 尾 value and age was examined, and the 尾 value was compared among the different CI subtypes.
Positive 尾 value correlated with age in control subjects (R = .69, P < .001) but not in CI patients (R = −.01, P = .996). There was no significant difference in the 尾 value when comparing control patients and patients with cardioembolic stroke (P = .106), but the 尾 value were lower in patients with cardioembolic stroke than in patients with noncardioembolic stroke (eg, small-vessel occlusion, large-artery atherosclerosis, and others, P = .009).
The 尾 value was lower in patients with cardioembolic stroke than in patients with noncardioembolic stroke. The 尾 value may be useful for estimating the risk of different stroke subtypes.