Table 3.

Cerebrovascular findings in 200 carotid dissections with and without ischemic events*

ArteryFindingIschemic events, n (%)p Value for ischemia vs no ischemia
Yes (n = 145)No (n = 55)
* Dissections occurred in 181 patients.
† Dissecting aneurysms were assessed by catheter or MR angiography.
‡ Middle and anterior cerebral arteries.
NS = not significant.
Extracranial internal carotid arteryNormal7 (5)16 (29)<0.0001
Stenosis ≤50%7 (5)9 (16)<0.01
Stenosis >50%10 (7)8 (15)NS
Stenosis >80% and occlusion121 (83)22 (40)<0.0001
Dissecting aneurysm10/101 (10)7/44 (16)NS
Atherosclerotic plaque13 (9)5 (9)NS
Intracranial arteriesStenosis or occlusion43 (30)2 (4)<0.001
Median latency (range)Symptom onset, ultrasonography2 d (0–90 d)10 d (0–125 d)<0.0001