Table 1.

Magnetic resonance angiography findings

	Normal/mild atherosclerotic changes (<30% stenosis)	Moderately stenosed (30–50% stenosis)	Severely stenosed (>50% stenosis)
Right middle cerebral artery	60 (69.8%)	11 (12.8%)	15 (17.4%)
Left middle cerebral artery	67 (77.9%)	11 (12.8%)	8 (9.3%)
Right anterior cerebral artery	71 (82.6%)	10 (11.6%)	5 (5.8%)
Left anterior cerebral artery	70 (81.4%)	11 (12.8%)	5 (5.8%)
Right posterior cerebral artery	70 (81.4%)	12 (14.0%)	4 (4.7%)
Left posterior cerebral artery	69 (80.2%)	11 (12.8%)	6 (7.0%)
Overall	407 (78.9%)	66 (12.8%)	43 (8.3%)