2024
Automated detection of early signs of irreversible ischemic change on CTA source images in patients with large vessel occlusion
Mak A, Matouk C, Avery E, Behland J, Haider S, Frey D, Madai V, Vajkoczy P, Griessenauer C, Zand R, Hendrix P, Abedi V, Sanelli P, Falcone G, Petersen N, Sansing L, Sheth K, Payabvash S, Malhotra A. Automated detection of early signs of irreversible ischemic change on CTA source images in patients with large vessel occlusion. PLOS ONE 2024, 19: e0304962. PMID: 38870240, PMCID: PMC11175522, DOI: 10.1371/journal.pone.0304962.Peer-Reviewed Original ResearchConceptsDiffusion-weighted imagingLarge vessel occlusionIrreversible ischemic changesPoor functional outcomeFunctional outcomesIschemic changesInfarct volumeAlberta Stroke Program Early CT ScorePredicting poor functional outcomeVessel occlusionFollow-up diffusion-weighted imagingAnterior circulation LVO strokeCTA source imagesReceiver operating characteristic curveExpert human readersPredicting final infarctionASPECTS regionsAdmission CTANon-inferior performanceBaseline CTACT scoreFinal infarctEndovascular therapyHU attenuationValidation cohort
2023
Association between intraprocedural drops in blood pressure and infarct growth rate patterns after acute large-vessel occlusions
Galecio-Castillo M, Quispe-Orozco D, Farooqui M, Dajles A, Vivanco-Suarez J, Rodriguez-Calienes A, Prasad A, Begunova L, Petersen N, Ortega-Gutierrez S. Association between intraprocedural drops in blood pressure and infarct growth rate patterns after acute large-vessel occlusions. Journal Of NeuroInterventional Surgery 2023, jnis-2023-020899. PMID: 37923382, PMCID: PMC11271969, DOI: 10.1136/jnis-2023-020899.Peer-Reviewed Original ResearchRelative cerebral blood flowInfarct growth ratesFinal infarct volumeHypoperfusion intensity ratioAlberta Stroke Program Early CT ScoreMedian arterial pressureDiffusion-weighted imaging (DWI) magnetic resonance imagingCerebral infarction 2Modified Rankin scoreLarge vessel occlusionEndovascular therapyInfarct volumeStroke onsetBlood pressureAcute large vessel occlusionHealth Stroke Scale scoreStroke Scale scoreAcute ischemic strokeCohort observational studySubgroup of patientsCerebral blood flowBlood pressure dropLVO-AISRankin scoreInfarct growthLow‐Field Portable Magnetic Resonance Imaging for Post‐Thrombectomy Assessment of Ongoing Brain Injury
Sujijantarat N, Koo A, Jambor I, Malhotra A, Mazurek M, Parasuram N, Yadlapalli V, Chavva I, Lalwani D, Zabinska J, Roy J, Antonios J, Elsamadicy A, Renedo D, Hebert R, Schindler J, Gilmore E, Sansing L, de Havenon A, Olexa M, Schiff S, Iglesias J, Rosen M, Kimberly W, Petersen N, Sheth K, Matouk C. Low‐Field Portable Magnetic Resonance Imaging for Post‐Thrombectomy Assessment of Ongoing Brain Injury. Stroke Vascular And Interventional Neurology 2023, 3 DOI: 10.1161/svin.123.000921.Peer-Reviewed Original ResearchMechanical thrombectomyInterventional radiology suiteMagnetic resonance imagingRadiology suiteConventional MRIResonance imagingCerebral Infarction scoreOngoing brain injuryLarge vessel occlusionInfarct burdenRevascularization timeInfarct volumeClinical characteristicsInfarct progressionAdverse eventsIschemic changesMethods PatientsMedian timeBedside evaluationBrain injuryTimely imagingResults TwentyPatientsSubsequent imagingProcedural detailsImaging biomarkers of cerebral edema automatically extracted from routine CT scans of large vessel occlusion strokes
Dhar R, Kumar A, Chen Y, Begunova Y, Olexa M, Prasad A, Carey G, Gonzalez I, Bhatia K, Hamed M, Heitsch L, Mainali S, Petersen N, Lee J. Imaging biomarkers of cerebral edema automatically extracted from routine CT scans of large vessel occlusion strokes. Journal Of Neuroimaging 2023, 33: 606-616. PMID: 37095592, PMCID: PMC10524672, DOI: 10.1111/jon.13109.Peer-Reviewed Original ResearchConceptsLarge vessel occlusion strokeMidline shiftCSF ratioMalignant edemaCerebral edemaOcclusion strokeCerebrospinal fluidAlberta Stroke Program Early CT ScoreCSF volumeTissue plasminogen activator treatmentHealth Stroke ScalePlasminogen activator treatmentRoutine CT scansNet water uptakeDecompressive surgeryInfarct volumeStroke ScaleOsmotic therapyBaseline CTCT scoreHemispheric volumeRoutine CTSerial CTContralateral regionsCT scan
2019
Decreases in Blood Pressure During Thrombectomy Are Associated With Larger Infarct Volumes and Worse Functional Outcome
Petersen NH, Ortega-Gutierrez S, Wang A, Lopez GV, Strander S, Kodali S, Silverman A, Zheng-Lin B, Dandapat S, Sansing LH, Schindler JL, Falcone GJ, Gilmore EJ, Amin H, Cord B, Hebert RM, Matouk C, Sheth KN. Decreases in Blood Pressure During Thrombectomy Are Associated With Larger Infarct Volumes and Worse Functional Outcome. Stroke 2019, 50: 1797-1804. PMID: 31159701, PMCID: PMC6787912, DOI: 10.1161/strokeaha.118.024286.Peer-Reviewed Original ResearchConceptsFinal infarct volumeWorse functional outcomeInfarct volumeEndovascular thrombectomyFunctional outcomeOcclusion strokeCerebral infarction 2b/3 reperfusionPressure reductionLarge vessel intracranial occlusionsGreater infarct growthBlood pressure reductionComprehensive stroke centerPercent of patientsBlood pressure managementLarger infarct volumesModified Rankin ScaleRankin Scale scoreMultivariable logistic regressionRelative hypotensionSustained hypotensionInfarct progressionNinety patientsInfarct growthIschemic penumbraIschemic stroke