Table 2.

Mean CBF of symptomatic and asymptomatic patients with MCA stenosis.

	Symptomatic MCA stenosis (n = 49)	Asymptomatic MCA stenosis (n = 32)
Mean CBF value of stenotic side (PLD = 1.5 s), ml/100 g/min	33.20 ± 7.85	41.49 ± 9.25
Mean CBF value of normal side (PLD = 1.5 s), ml/100 g/min	41.28 ± 6.31	48.64 ± 7.97
Mean CBF value of stenotic side (PLD = 2.5 s), ml/100 g/min	44.90 ± 6.75	46.88 ± 5.88
Mean CBF value of normal side (PLD = 2.5 s), ml/100 g/min	51.94 ± 8.60	50.46 ± 6.11

CBF: cerebral blood flow; MCA: middle cerebral artery; PLD: post labeling delay.