TY - JOUR
T1 - Global white matter hypoperfusion on CT predicts larger infarcts and hemorrhagic transformation after acute ischemia
AU - Bivard, Andrew
AU - Cheng, Xin
AU - Lin, Long-Ting
AU - Levi, Christopher
AU - Spratt, Neil
AU - Kleinig, Tim
AU - O'Brien, Billy
AU - Butcher, Kenneth
AU - Lou, Min
AU - Zhang, Jing-Fen
AU - Sylaja, P. N.
AU - Cao, Wen-Jie
AU - Jannes, Jim
AU - Dong, Qiang
AU - Parsons, Mark
PY - 2016
Y1 - 2016
N2 - Introduction: Presence of white matter hyperintensity (WMH) on MRI is a marker of cerebral small vessel disease and is associated with increased small vessel stroke and increased risk of hemorrhagic transformation (HT) after thrombolysis. Aim: We sought to determine whether white matter hypoperfusion (WMHP) on perfusion CT (CTP) was related to WMH, and if WMHP predisposed to acute lacunar stroke subtype and HT after thrombolysis. Methods: Acute ischemic stroke patients within 12 h of symptom onset at 2 centers were prospectively recruited between 2011 and 2013 for the International Stroke Perfusion Imaging Registry. Participants routinely underwent baseline CT imaging, including CTP, and follow-up imaging with MRI at 24 h. Results: Of 229 ischemic stroke patients, 108 were Caucasians and 121 Chinese. In the contralateral white matter, patients with acute lacunar stroke had lower cerebral blood flow (CBF) and cerebral blood volume (CBV), compared to those with other stroke subtypes (P = 0.041). There were 46 patients with HT, and WMHP was associated with increased risk of HT (R 2 = 0.417, P = 0.002). Compared to previously reported predictors of HT, WMHP performed better than infarct core volume (R 2 = 0.341, P = 0.034), very low CBV volume (R 2 = 0.249, P = 0.026), and severely delayed perfusion (Tmax>14 second R 2 = 0.372, P = 0.011). Patients with WMHP also had larger acute infarcts and increased infarct growth compared to those without WMHP (mean 28 mL vs. 13 mL P<0.001). Conclusion: White matter hypoperfusion remote to the acutely ischemic region on CTP is a marker of small vessel disease and was associated with increased HT, larger acute infarct cores, and greater infarct growth.
AB - Introduction: Presence of white matter hyperintensity (WMH) on MRI is a marker of cerebral small vessel disease and is associated with increased small vessel stroke and increased risk of hemorrhagic transformation (HT) after thrombolysis. Aim: We sought to determine whether white matter hypoperfusion (WMHP) on perfusion CT (CTP) was related to WMH, and if WMHP predisposed to acute lacunar stroke subtype and HT after thrombolysis. Methods: Acute ischemic stroke patients within 12 h of symptom onset at 2 centers were prospectively recruited between 2011 and 2013 for the International Stroke Perfusion Imaging Registry. Participants routinely underwent baseline CT imaging, including CTP, and follow-up imaging with MRI at 24 h. Results: Of 229 ischemic stroke patients, 108 were Caucasians and 121 Chinese. In the contralateral white matter, patients with acute lacunar stroke had lower cerebral blood flow (CBF) and cerebral blood volume (CBV), compared to those with other stroke subtypes (P = 0.041). There were 46 patients with HT, and WMHP was associated with increased risk of HT (R 2 = 0.417, P = 0.002). Compared to previously reported predictors of HT, WMHP performed better than infarct core volume (R 2 = 0.341, P = 0.034), very low CBV volume (R 2 = 0.249, P = 0.026), and severely delayed perfusion (Tmax>14 second R 2 = 0.372, P = 0.011). Patients with WMHP also had larger acute infarcts and increased infarct growth compared to those without WMHP (mean 28 mL vs. 13 mL P<0.001). Conclusion: White matter hypoperfusion remote to the acutely ischemic region on CTP is a marker of small vessel disease and was associated with increased HT, larger acute infarct cores, and greater infarct growth.
UR - https://hdl.handle.net/1959.7/uws:64495
U2 - 10.1111/cns.12491
DO - 10.1111/cns.12491
M3 - Article
SN - 1755-5949
SN - 1755-5930
VL - 22
SP - 238
EP - 243
JO - CNS Neuroscience and Therapeutics
JF - CNS Neuroscience and Therapeutics
IS - 3
ER -