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MR contrast agents in acute experimental cerebral ischemia: Potential adverse impacts on neurologic outcome and infarction size
Author(s) -
Doerfler Arnd,
Engelhorn Tobias,
Heiland Sabine,
Knauth Michael,
Wanke Isabel,
Forsting Michael
Publication year - 2000
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/(sici)1522-2586(200004)11:4<418::aid-jmri10>3.0.co;2-w
Subject(s) - gadodiamide , medicine , infarction , magnetic resonance imaging , occlusion , ischemia , cerebral infarction , saline , bolus (digestion) , adverse effect , stroke (engine) , anesthesia , nuclear medicine , radiology , myocardial infarction , mechanical engineering , engineering
The purpose of the study was to investigate the effects of magnetic resonance (MR) contrast agents on neurologic outcome and infarction size in a rat stroke model. Focal cerebral ischemia was induced in 80 rats using an endovascular occlusion technique of the middle cerebral artery. Four hours after occlusion, 64 animals (4 groups of 16 each) received gadodiamide (Gd‐DTPA‐BMA) in a single (0.1 mmol/kg) or triple (0.3 mmol/kg) clinical dose or the ultrasmall superparamagnetic iron oxide particles contrast agent NC 100150 in a single (0.03 mmol/kg, 1.5 mg Fe 2+ /kg) or double (0.06 mmol/kg, 3.0 mg Fe 2+ /kg) clinical dose, respectively. Sixteen animals received equivolumetric saline (control group). Neurologic score and body weight were recorded every 8 hours. Twenty‐four hours after vessel occlusion, infarction size was measured by 2,3,5‐triphenyl‐tetrazolium‐chloride (TTC) staining. Neither the normal nor the triple clinical dose of gadodiamide or NC 100150 in the single or double dose had any statistically significant effects on infarction volume, mortality, body weight, or neurologic outcome ( P > 0.05). Our results suggest that bolus injection of gadodiamide and the ultrasmall superparamagnetic iron oxide particles NC 100150 in clinically relevant doses does not significantly affect infarction volume and clinical outcome of acute cerebral ischemia. J. Magn. Reson. Imaging 2000;11:418–424. © 2000 Wiley‐Liss, Inc.