2022
Impact of collateral flow on cost-effectiveness of endovascular thrombectomy.
Khunte M, Wu X, Avery EW, Gandhi D, Payabvash S, Matouk C, Heit JJ, Wintermark M, Albers GW, Sanelli P, Malhotra A. Impact of collateral flow on cost-effectiveness of endovascular thrombectomy. Journal Of Neurosurgery 2022, 137: 1801-1810. PMID: 35535841, DOI: 10.3171/2022.2.jns212887.Peer-Reviewed Original ResearchConceptsIncremental cost-effectiveness ratioEndovascular thrombectomyIschemic stroke patientsCollateral statusPoor collateral statusBetter outcomesPoor collateralsCollateral circulationStroke patientsAcute ischemic stroke patientsModified Rankin Scale scorePoor collateral circulationRankin Scale scoreLarge vessel occlusionCollateral blood flowGood collateral blood flowCost-effectiveness ratioBase-case analysisProbabilistic sensitivity analysesEVT strategyEVT treatmentIschemic strokeMedical therapyMore patientsCollateral flow
2017
Multivariate Prognostic Model of Acute Stroke Combining Admission Infarct Location and Symptom Severity: A Proof-of-Concept Study
Payabvash S, Benson JC, Tyan AE, Taleb S, McKinney AM. Multivariate Prognostic Model of Acute Stroke Combining Admission Infarct Location and Symptom Severity: A Proof-of-Concept Study. Journal Of Stroke And Cerebrovascular Diseases 2017, 27: 936-944. PMID: 29198948, DOI: 10.1016/j.jstrokecerebrovasdis.2017.10.034.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overArea Under CurveBrainBrain IschemiaBrain MappingDatabases, FactualDecision Support TechniquesDiffusion Magnetic Resonance ImagingDisability EvaluationFemaleHumansLogistic ModelsMaleMesencephalonMiddle AgedMultivariate AnalysisOdds RatioPatient AdmissionPonsPredictive Value of TestsProof of Concept StudyReproducibility of ResultsRetrospective StudiesRisk FactorsROC CurveSeverity of Illness IndexStrokeTime FactorsTreatment OutcomeConceptsDisability/deathMidbrain/ponsAcute ischemic stroke patientsIschemic stroke patientsAdmission NIHSS scoreStroke patientsNIHSS scoreIndependent predictorsInfarct locationScale scoreHealth Stroke Scale scoreHigher admission NIHSS scoresModified Rankin Scale scoreSymptom severityAdmission stroke severityBaseline functional disabilityLarger infarct volumesStroke Scale scoreRankin Scale scoreHours of onsetAcute ischemic infarctMultivariate prognostic modelMajor arterial occlusionHypothesis-generating studyVoxel-based analysis
2016
The Effects of DWI‐Infarct Lesion Volume on DWI‐FLAIR Mismatch: Is There a Need for Size Stratification?
Payabvash S, Taleb S, Benson JC, Rykken JB, Oswood MC, McKinney AM, Hoffman B. The Effects of DWI‐Infarct Lesion Volume on DWI‐FLAIR Mismatch: Is There a Need for Size Stratification? Journal Of Neuroimaging 2016, 27: 392-396. PMID: 27878926, DOI: 10.1111/jon.12407.Peer-Reviewed Original ResearchConceptsDWI-FLAIR mismatchPositive predictive valueDWI lesion volumeLesion volumeNegative predictive valueStroke onsetAcute infarctsStroke patientsInfarct lesionsPredictive valueFluid-attenuated inversion recovery hyperintensityAcute ischemic stroke patientsInfarct lesion volumeIschemic stroke patientsHours of onsetInversion recovery hyperintensityContralateral normal sideIdentification of strokePotential imaging biomarkerMultivariate regression analysisIdentification of infarctionSymptom onsetTherapy timeNormal sideImaging biomarkersClinical implications of eye deviation on admission CT examination of acute ischaemic stroke patients
Payabvash S, Qureshi I, Qureshi AI. Clinical implications of eye deviation on admission CT examination of acute ischaemic stroke patients. Clinical Radiology 2016, 71: 1314.e11-1314.e15. PMID: 27592397, DOI: 10.1016/j.crad.2016.08.002.Peer-Reviewed Original ResearchConceptsAlberta Stroke Program Early CT ScoreAcute ischemic stroke patientsIschemic stroke patientsHigher admission NIHSS scoresAdmission NIHSS scoreEye deviationStroke patientsNIHSS scoreHaemorrhagic transformationCT examinationsLow Alberta Stroke Program Early CT ScoreScale scoreHealth Stroke Scale scoreOlder ageAdmission CT examinationAdmission National InstitutesPatients' older ageStroke Scale scoreHigh rateRankin Scale scoreInfarct volumeMRS scoreAdmission CTCT scorePrognostic valueInterhemispheric Asymmetry in Distribution of Infarct Lesions among Acute Ischemic Stroke Patients Presenting to Hospital
Payabvash S, Taleb S, Benson JC, McKinney AM. Interhemispheric Asymmetry in Distribution of Infarct Lesions among Acute Ischemic Stroke Patients Presenting to Hospital. Journal Of Stroke And Cerebrovascular Diseases 2016, 25: 2464-2469. PMID: 27373730, DOI: 10.1016/j.jstrokecerebrovasdis.2016.06.019.Peer-Reviewed Original ResearchConceptsRight-sided strokeLeft-sided strokeAcute ischemic stroke patientsEarly clinical outcomesIschemic stroke patientsIschemic infarctInfarct lesionsInsular ribbonVoxel-based analysisClinical outcomesStroke patientsLentiform nucleusScale scoreHealth Stroke Scale scoreModified Rankin Scale scoreSymptom severityStroke risk factorsStroke Scale scoreHours of onsetRankin Scale scoreAcute ischemic infarctRate of treatmentAdmission symptomsSymptomatic infarctsRisk factors
2015
Detection of Intraparenchymal Hemorrhage After Endovascular Therapy in Patients with Acute Ischemic Stroke Using Immediate Postprocedural Flat‐Panel Computed Tomography Scan
Payabvash S, Khan AA, Qureshi MH, Saeed O, Suri MF, Qureshi AI. Detection of Intraparenchymal Hemorrhage After Endovascular Therapy in Patients with Acute Ischemic Stroke Using Immediate Postprocedural Flat‐Panel Computed Tomography Scan. Journal Of Neuroimaging 2015, 26: 213-218. PMID: 26282065, DOI: 10.1111/jon.12277.Peer-Reviewed Original ResearchConceptsMultidetector CT studiesNegative predictive valueIschemic stroke patientsIntraparenchymal hemorrhageCT scanEndovascular treatmentHyperdense lesionParenchymal lesionsStroke patientsPredictive valueCT studiesMultidetector CTAcute ischemic stroke patientsAcute ischemic strokeAcute stroke patientsMultidetector CT scanPositive predictive valueEndovascular therapyIschemic strokePost procedureTomography scanSeparate cohortSuch lesionsPatientsDiagnostic valueMiddle Cerebral Artery Residual Contrast Stagnation on Noncontrast CT Scan Following Endovascular Treatment in Acute Ischemic Stroke Patients
Payabvash S, Qureshi MH, Taleb S, Pawar S, Qureshi AI. Middle Cerebral Artery Residual Contrast Stagnation on Noncontrast CT Scan Following Endovascular Treatment in Acute Ischemic Stroke Patients. Journal Of Neuroimaging 2015, 25: 946-951. PMID: 25684437, DOI: 10.1111/jon.12211.Peer-Reviewed Original ResearchConceptsAcute ischemic stroke patientsMCA M1 occlusionIschemic stroke patientsIntraparenchymal hemorrhageEndovascular treatmentContrast stagnationCT scanPostprocedural CT scanNoncontrast CT scanStroke patientsM1 occlusionContralateral arteryHounsfield unitsAverage HU valueM1 segmentRelative riskNoncontrast CTPatientsScansArteryTreatmentAttenuation differenceHU valuesOcclusionRisk
2014
Differentiating intraparenchymal hemorrhage from contrast extravasation on post-procedural noncontrast CT scan in acute ischemic stroke patients undergoing endovascular treatment
Payabvash S, Qureshi MH, Khan SM, Khan M, Majidi S, Pawar S, Qureshi AI. Differentiating intraparenchymal hemorrhage from contrast extravasation on post-procedural noncontrast CT scan in acute ischemic stroke patients undergoing endovascular treatment. Neuroradiology 2014, 56: 737-744. PMID: 24925217, DOI: 10.1007/s00234-014-1381-8.Peer-Reviewed Original ResearchConceptsPost-procedural CT scanAcute ischemic stroke patientsIschemic stroke patientsContrast extravasationIntraparenchymal hemorrhageEndovascular treatmentStroke patientsCT scanNoncontrast CT scanHyperdense lesionHounsfield unitsParenchymal lesionsImaging recordsIntroductionThis studyHemorrhagePatientsExtravasationLesionsScansHyperdensityHyperdenseTreatmentAverage attenuationCharacteristic analysisResultsOf
2013
Variable Selection and Prediction Using a Nested, Matched Case-Control Study: Application to Hospital Acquired Pneumonia in Stroke Patients
Qian J, Payabvash S, Kemmling A, Lev MH, Schwamm LH, Betensky RA. Variable Selection and Prediction Using a Nested, Matched Case-Control Study: Application to Hospital Acquired Pneumonia in Stroke Patients. Biometrics 2013, 70: 153-163. PMID: 24320930, PMCID: PMC3954429, DOI: 10.1111/biom.12113.Peer-Reviewed Original ResearchConceptsMassachusetts General HospitalCase-control studyStroke patientsAcute ischemic stroke patientsBrain regionsMatched Case-Control StudyHospital-Acquired PneumoniaIschemic stroke patientsLarge prospective studiesUnconditional logistic regressionCase-control designSpecific brain regionsAcquired PneumoniaAcute infarctionClinical featuresProspective studyClinical variablesGeneral HospitalEpidemiologic studiesPatientsModern imagingLarger studyLogistic regressionAppropriate statistical analysisHAP studies