Table 2.

Histological Features of the Carotid Plaques

	Symptomatic	Asymptomatic	P
Number	40	38	—
AHA class
III	—	2	—
IV	9	4	0.15
V to VI	31	32	0.45
Plaque rupture, n	16	3	0.001
Necrotic core (>25%)	35	28	0.12
Intraplaque hemorrhage, n	23	18	0.37
Intraluminal thrombosis, n	5	0	0.02
Fibrosis, n	38	36	0.95
Angiogenesis, n	33	27	0.23
Calcification, n	31	32	0.45
Macrophage infiltration, n	39	32	0.05

AHA indicates American Heart Association.