1Christoforidis GA, Mohammad Y, Kehagias D, et al. Angiographic assessment of pial collaterals as aprognostic indicator following intra-arterial thrombolysis for acute ischemic stroke. AJNR Am J Neuroradiol, 2005, 26:1789-1797.
2Zachrisson H, Berthelsen B, Blomstrand C, et al. Influence of poststenotic collateral pressure on blood flow velocities within high- grade carotid artery stenosis: differences between morphologic and functional measurements. J Vasc Surg, 2001, 34:263-268.
6Higashida RT, Fudan AJ, Roberts H, et al. Trial design and reporting standards for intra-arterial cerebral thrombolysis for acute ischemic stroke. Stroke,2003, 34: e109-137.
6Henderson RD, Eliasziw M, Fox A J, et al. Angiographically defined collateral circulation and risk of stroke in patients with severe carotid artery stenosis. Stroke, 2000,31:128-132.
7Liebeskind DS. Collateral circulation. Stroke, 2003,34 : 2279- 2284.