BACKGROUND AND PURPOSE: Case reports have demonstrated complete early reversal of hyperintensities on diffusion-weighted imaging (DWI) after clinically diagnosed stroke. We aimed to investigate systematically the rate and characteristics of reversible diffusion hyperintensities (RDHs) in the first week after stroke. METHODS: Patients with clinical diagnosis of an acute cerebrovascular event and evidence of ischemia on DWI were included. MRI scans were performed on admission, on the following day, and 4 to 7 days after onset of symptoms with DWI and fluid-attenuated inversion recovery. Baseline and follow-up DWIs were coregistered and examined for individual RDHs. Characteristics of patients and of hyperintensities associated with early reversal were identified. RESULTS: We included 153 patients with a median National Institutes of Health Stroke Scale score of 4 (interquartile range, 2-8). In 3 patients (2%), MR images normalized completely. Thirty-seven patients (24%) displayed individual RDHs. Of 611 initial DWI hyperintensities, 97 (16%) reversed. Thirteen percent of the RDHs had corresponding abnormalities on fluid-attenuated inversion recovery images at the third measurement. Median size of the RDHs was 0.029 mL (interquartile range, 0.013-0.055). RDHs were associated with a multiple infarct pattern (odds ratio, 22.1; 95% confidence interval, 4.5-109.7) and symptomatic carotid stenosis (odds ratio, 5.5; 95% confidence interval, 1.4-21.5). Fifty-nine percent of the patients with RDHs had new additional lesions on follow-up DWI. RDHs were not associated with functional improvement on the National Institutes of Health Stroke Scale score. CONCLUSIONS: In this population of mainly minor to moderate stroke patients, complete normalization of MR images was rare. Complete reversal of individual DWI hyperintensities was limited to very small lesions and mostly occurred in embolic stroke patients. Clinical Trial Registration- URL: http://www.clinicaltrials.gov. Unique identifier: NCT00715533.
BACKGROUND AND PURPOSE: Case reports have demonstrated complete early reversal of hyperintensities on diffusion-weighted imaging (DWI) after clinically diagnosed stroke. We aimed to investigate systematically the rate and characteristics of reversible diffusion hyperintensities (RDHs) in the first week after stroke. METHODS:Patients with clinical diagnosis of an acute cerebrovascular event and evidence of ischemia on DWI were included. MRI scans were performed on admission, on the following day, and 4 to 7 days after onset of symptoms with DWI and fluid-attenuated inversion recovery. Baseline and follow-up DWIs were coregistered and examined for individual RDHs. Characteristics of patients and of hyperintensities associated with early reversal were identified. RESULTS: We included 153 patients with a median National Institutes of Health Stroke Scale score of 4 (interquartile range, 2-8). In 3 patients (2%), MR images normalized completely. Thirty-seven patients (24%) displayed individual RDHs. Of 611 initial DWI hyperintensities, 97 (16%) reversed. Thirteen percent of the RDHs had corresponding abnormalities on fluid-attenuated inversion recovery images at the third measurement. Median size of the RDHs was 0.029 mL (interquartile range, 0.013-0.055). RDHs were associated with a multiple infarct pattern (odds ratio, 22.1; 95% confidence interval, 4.5-109.7) and symptomatic carotid stenosis (odds ratio, 5.5; 95% confidence interval, 1.4-21.5). Fifty-nine percent of the patients with RDHs had new additional lesions on follow-up DWI. RDHs were not associated with functional improvement on the National Institutes of Health Stroke Scale score. CONCLUSIONS: In this population of mainly minor to moderate strokepatients, complete normalization of MR images was rare. Complete reversal of individual DWI hyperintensities was limited to very small lesions and mostly occurred in embolic strokepatients. Clinical Trial Registration- URL: http://www.clinicaltrials.gov. Unique identifier: NCT00715533.
Authors: Alexandra J Lansky; Steven R Messé; Adam M Brickman; Michael Dwyer; H Bart van der Worp; Ronald M Lazar; Cody G Pietras; Kevin J Abrams; Eugene McFadden; Nils H Petersen; Jeffrey Browndyke; Bernard Prendergast; Vivian G Ng; Donald E Cutlip; Samir Kapadia; Mitchell W Krucoff; Axel Linke; Claudia Scala Moy; Joachim Schofer; Gerrit-Anne van Es; Renu Virmani; Jeffrey Popma; Michael K Parides; Susheel Kodali; Michel Bilello; Robert Zivadinov; Joseph Akar; Karen L Furie; Daryl Gress; Szilard Voros; Jeffrey Moses; David Greer; John K Forrest; David Holmes; Arie P Kappetein; Michael Mack; Andreas Baumbach Journal: Eur Heart J Date: 2018-05-14 Impact factor: 29.983
Authors: Mayank Goyal; Ryan McTaggart; Johanna M Ospel; Aad van der Lugt; Michael Tymianski; Roland Wiest; Johan Lundberg; Rüdiger von Kummer; Michael D Hill; Sven Luijten; Bob Roozenbeek; Jeffrey L Saver; Rosalie V McDonough Journal: Neuroradiology Date: 2022-07-20 Impact factor: 2.995
Authors: Anne L Abbott; Mauro Silvestrini; Raffi Topakian; Jonathan Golledge; Alejandro M Brunser; Gert J de Borst; Robert E Harbaugh; Fergus N Doubal; Tatjana Rundek; Ankur Thapar; Alun H Davies; Anthony Kam; Joanna M Wardlaw Journal: Front Neurol Date: 2017-10-18 Impact factor: 4.003