2023
Reduced-order modeling and analysis of dynamic cerebral autoregulation via diffusion maps
dos Santos K, Katsidoniotaki M, Miller E, Petersen N, Marshall R, Kougioumtzoglou I. Reduced-order modeling and analysis of dynamic cerebral autoregulation via diffusion maps. Physiological Measurement 2023, 44: 044001. PMID: 36963111, PMCID: PMC11271258, DOI: 10.1088/1361-6579/acc780.Peer-Reviewed Original ResearchMeSH KeywordsArterial PressureCarotid StenosisConstriction, PathologicHomeostasisHumansReproducibility of ResultsConceptsDiffusion mapsState-space descriptionReduced-order modelingIntrinsic dynamicsTime derivativeLow-dimensional representationRandom walkMarkov matrixParsimonious modelingSignificant eigenvaluesEigenvalue ratioFurther dimension reductionEigenvalue analysisTransfer function analysisDimension reductionData-driven techniquesMain resultsDynamicsEigenvaluesFlow velocityModelingSuperior performanceMap techniqueGraphWalk
2022
Interaction of Mean Arterial Pressure and Blood Pressure Variability in Critically Ill Brain Injured Patients
de Havenon A, Petersen N, Stulberg E, Anadani M, Biffi A, Sheth K. Interaction of Mean Arterial Pressure and Blood Pressure Variability in Critically Ill Brain Injured Patients. Stroke 2022, 53: e512-e514. PMID: 36367101, PMCID: PMC9712254, DOI: 10.1161/strokeaha.122.041274.Peer-Reviewed Original Research
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
2014
Comparison of non-invasive and invasive arterial blood pressure measurement for assessment of dynamic cerebral autoregulation.
Petersen NH, Ortega-Gutierrez S, Reccius A, Masurkar A, Huang A, Marshall RS. Comparison of non-invasive and invasive arterial blood pressure measurement for assessment of dynamic cerebral autoregulation. Neurocritical Care 2014, 20: 60-8. PMID: 24452959, DOI: 10.1007/s12028-013-9949-4.Peer-Reviewed Original ResearchConceptsDynamic cerebral autoregulationAssessment of DCAAcute brain injuryBlood pressure monitoringBlood pressure measurementsCerebral autoregulationBrain injuryPressure monitoringInvasive arterial blood pressure measurementsInvasive arterial blood pressure monitoringGood inter-method agreementArterial blood pressure monitoringCerebral blood flow velocityArterial blood pressure measurementsDirect intravascular measurementMean velocity indexMean patient ageArterial blood pressureRadial artery catheterCerebral blood flowMonitoring of patientsBlood flow velocityBlood pressure methodDCA assessmentArtery catheter