Table 2:

Incidence of MES on MES-1 and MES-2 scans is listed according to the following variables: modality of treatment, heparin, clopidogrel, heparin ± clopidogrel, extent of occlusion ± heparin, and size of aneurysm ± heparin

Variable	MES-1 Scan			MES-2 Scan			New Infarct n(% of Group)	New Symptom at Discharge n(% of Group)
Variable	n(% of Total)	MES Mean (SD)	t Test	n (% of Total)	MES Mean (SD)	t Test	New Infarct n(% of Group)	New Symptom at Discharge n(% of Group)
Total	123 (100)	3.9 (12.4)		123 (100)	0.8 (2.8)		2 (1.6)	1 (0.8)
With stent	33 (26.8)	6.8 (18.2)		33 (26.8)	1.6 (4.4)		2 (6.1)	1 (3.0)
Heparin
On heparin	119 (96.7)	3.4 (10.9)	P <. 05	10 (8.1)	6 (7.2)	P < .001	1 (0.9)	0 (0)
Off heparin	4 (3.3)	18.8 (35.5)		113 (91.9)	0.4 (1.3)		1 (25)	1 (25)
Clopidogrel
On clopidogrel	94 (76.4)	3.5 (11.8)	NS	105 (85.4)	0.9 (3.0)	NS	2 (2.1)	1 (1.1)
Off clopidogrel	28 (22.7)	5.3 (14.4)		18 (14.6)	0.3 (1.4)		0 (0)	0 (0)
Heparin ± clopidogrel
On heparin, on clopidogrel	93 (75.6)	2.8 (9.5)	NS	10 (8.1)	6 (7.2)		1 (1.1)	0 (0)
On heparin, off clopidogrel	26 (21.1)	5.6 (14.9)		0 (0)			0 (0)	0 (0)
Extent of occlusion	On heparin			Off heparin			All
Complete (100%)	91 (74.0)	3.4 (11.0)	NS	85 (69.1)	0.4 (1.4)	NS	1 (0.8)	0 (0)
Near complete (>90%)	24 (19.5)			25 (20.3)
Incomplete (<90%)	4 (3.3)	1.5 (3)		3 (2.4)	0 (0)		1 (20)	1 (20)
Size of aneurysm	On heparin			Off heparin			All
<10 mm	97 (78.9)	3.0 (9.4)	NS	91 (74.0)	0.3 (1.0)	NS	0 (0)	0 (0)
≥10 mm	22 (17.9)	5.1 (16.0)		22 (17.9)	0.7 (2.3)		2 (8.3)	1 (4.2)
Stent-assisted	On heparin			Off heparin			All
With stent	32 (26.0)	4.8 (14.2)	NS	29 (23.6)	0.3 (1.2)	NS	2 (6.1)	1 (3.0)
Without stent	87 (70.7)	2.9 (9.4)		84 (68.3)	0.4 (1.4)		0 (0)	0 (0)

Note:—Total number of patients and relative percentage of total are given. Significance of differences for the absolute number of occurrences is calculated by a Student t test. Total number of new infarcts or new symptoms at the time of discharge is shown, with relative percentage of respective group.