Calcifications of Vertebrobasilar Arteries on CT: Detailed Distribution and Relation to Risk Factors in 245 Ischemic Stroke Patients

Table 2

Distribution of calcifications by calcification type.

Vessel/type of calcif.	N (%)	Vessel area (mm^2)	Focus Nr.	VL	VM	DL	DM	Extension (cont.)	Slice Nr. (median, quintiles)
VAs	236/245 (96.3)
Right V.	155 (63.3)	71.2±25.8
Focal	141 (91.0)		1 (1-2)	59 (41.2)	56 (39.7)	42 (29.8)	70 (49.6)	73 (51.8)	1 (1-2)
Crescent	47 (30.3)		—	—	—	—	—	42 (89.4)	2 (1-2)
Circular	10 (6.4)		—	—	—	—	—	9 (90.0)	2 (1-2)
Left V.	186 (75.9)	79.8±29.6
Focal	168 (90.3)		1 (1-2)	79 (47.0)	79 (47.0)	46 (27.4)	84 (50.0)	92 (54.8)	2 (1-2)
Crescent	54 (29.0)		—	—	—	—	—	45 (83.3)	1 (1-2)
Circular	9 (4.8)		—	—	—	—	—	8 (88.9)	2 (1-2)
Basilar	42 (17.1)	77.6±29.0		RV	RD	LV	LD
Focal	42 (100.0)		1 (1-2)	24 (57.1)	14 (33.3)	15 (35.7)	11 (26.2)	17 (40.5)	1 (1-2)
Crescent	3 (7.1)		—	—	—	—	—	3 (7.1)	2 (1–3)
Circular	0 (0.0)		—	—	—	—	—	—	—

VAs: vertebral arteries; right V.: right vertebral; Left V.: left vertebral; focus Nr.: number of distinct focuses observed; VL: ventrolateral; VM: ventromedial; DL: dorsolateral; DM: dorsomedial; RV: right ventral; RD: right dorsal; LV: left ventral; LD: left dorsal; focal c.: focal calcifications; cont.: continuous extension of calcifications; data are N (per cent), median (quintiles 25%–75%), or mean ± standard deviation (st. dev.).