2021
Association Between Hospital Volumes and Clinical Outcomes for Patients With Nontraumatic Subarachnoid Hemorrhage
Leifer D, Fonarow G, Hellkamp A, Baker D, Hoh B, Prabhakaran S, Schoeberl M, Suter R, Washington C, Williams S, Xian Y, Schwamm L. Association Between Hospital Volumes and Clinical Outcomes for Patients With Nontraumatic Subarachnoid Hemorrhage. Journal Of The American Heart Association 2021, 10: e018373. PMID: 34325522, PMCID: PMC8475679, DOI: 10.1161/jaha.120.018373.Peer-Reviewed Original ResearchConceptsAnnual case volumeComprehensive Stroke Center (CSC) certificationStroke center certificationNational Inpatient SampleSubarachnoid hemorrhageNontraumatic subarachnoid hemorrhageCase volumeHospital mortalityClinical outcomesPoor outcomeCenter certificationSAH casesBetter outcomesVolume thresholdHospital annual case volumeHospital case volumeCases/yearBackground Previous studiesLogistic regression modelsSAH hospitalizationsHospital volumeAneurysm obliterationInpatient SampleOdds ratioImproved outcomes
2014
Hospital Case Volume Is Associated With Mortality in Patients Hospitalized With Subarachnoid Hemorrhage
Prabhakaran S, Fonarow G, Smith E, Liang L, Xian Y, Neely M, Peterson E, Schwamm L. Hospital Case Volume Is Associated With Mortality in Patients Hospitalized With Subarachnoid Hemorrhage. Neurosurgery 2014, 75: 500-508. PMID: 24979097, DOI: 10.1227/neu.0000000000000475.Peer-Reviewed Original ResearchConceptsHospital case volumeHospital mortalitySubarachnoid hemorrhageCase volumeSAH volumeSAH patientsHospital characteristicsMedian annual case volumeGuidelines-Stroke registryLarge nationwide registryMultivariable logistic regressionLength of stayAnnual case volumeContemporary national dataIndependent ambulatory statusAmbulatory statusExperienced centersNationwide registryDischarge diagnosisOptimized careImproved outcomesRelevant patientsPatientsHospitalMortality
2012
Peripartum Subarachnoid Hemorrhage
Bateman B, Olbrecht V, Berman M, Minehart R, Schwamm L, Leffert L. Peripartum Subarachnoid Hemorrhage. Anesthesiology 2012, 116: 324-333. PMID: 22166951, DOI: 10.1097/aln.0b013e3182410b22.Peer-Reviewed Original ResearchConceptsSubarachnoid hemorrhageHypertensive disordersRisk factorsPregnancy-related admissionsIndependent risk factorIntracranial venous thrombosisNationwide Inpatient SampleAfrican American raceVariety of etiologiesRange of etiologiesSickle cell diseaseIdentified admissionsHospital deathMaternal morbidityNonpregnant patientsNonpregnant womenIndependent predictorsMalignant etiologySevere headacheVenous thrombosisNonpregnant controlsPregnancy resultsVenous bleedingInstitution experienceInpatient Sample
2010
Characteristics, Performance Measures, and In-Hospital Outcomes of the First One Million Stroke and Transient Ischemic Attack Admissions in Get With The Guidelines-Stroke
Fonarow G, Reeves M, Smith E, Saver J, Zhao X, Olson D, Hernandez A, Peterson E, Schwamm L. Characteristics, Performance Measures, and In-Hospital Outcomes of the First One Million Stroke and Transient Ischemic Attack Admissions in Get With The Guidelines-Stroke. Circulation Cardiovascular Quality And Outcomes 2010, 3: 291-302. PMID: 20177051, DOI: 10.1161/circoutcomes.109.921858.Peer-Reviewed Original ResearchConceptsHospital mortality rateIntracerebral hemorrhageQuality of careIschemic strokeSubarachnoid hemorrhageMortality rateTransient ischemic attack admissionsTransient ischemic attack patientsIn-Hospital OutcomesAcute ischemic strokeIschemic stroke patientsAdjusted odds ratioLength of stayQuality improvement effortsGuidelines-StrokeGWTG-StrokeTIA admissionsTIA careTIA patientsHospital outcomesAcute strokeStroke patientsMean ageAttack patientsNational surveillance
2001
Fever in subarachnoid hemorrhage
Oliveira–Filho J, Ezzeddine M, Segal A, Buonanno F, Chang Y, Ogilvy C, Rordorf G, Schwamm L, Koroshetz W, McDonald C. Fever in subarachnoid hemorrhage. Neurology 2001, 56: 1299-1304. PMID: 11376177, DOI: 10.1212/wnl.56.10.1299.Peer-Reviewed Original ResearchConceptsSubarachnoid hemorrhagePoor outcomeTranscranial DopplerNeurologic intensive care unitOlder ageDaily transcranial DopplerGlasgow Coma ScoreHunt-Hess gradeRankin Scale scoreCause of feverIntensive care unitPresence of infectionNontraumatic subarachnoid hemorrhageSymptomatic vasospasmCerebral ischemiaComa ScoreConsecutive patientsAngiographic criteriaCare unitBrain injuryHemorrhage severityVasospasmPatientsFeverScale score
1999
Diffusion- and Perfusion-Weighted Imaging in Vasospasm After Subarachnoid Hemorrhage
Rordorf G, Koroshetz W, Copen W, Gonzalez G, Yamada K, Schaefer P, Schwamm L, Ogilvy C, Sorensen A. Diffusion- and Perfusion-Weighted Imaging in Vasospasm After Subarachnoid Hemorrhage. Stroke 1999, 30: 599-605. PMID: 10066858, DOI: 10.1161/01.str.30.3.599.Peer-Reviewed Original ResearchConceptsRelative cerebral blood flowRelative cerebral blood volumeAngiographic vasospasmIschemic injurySymptomatic vasospasmNeurological deficitsClinical signsSevere angiographic vasospasmCerebral tissue perfusionEarly ischemic injurySubarachnoid hemorrhage patientsCerebral blood flowIntravenous contrast bolusPerfusion-Weighted ImagingCerebral blood volumeDWI abnormalitiesAsymptomatic patientsHemodynamic abnormalitiesNormal angiogramsAngiographic spasmImaging abnormalitiesIschemic lesionsHemorrhage patientsSubarachnoid hemorrhageClinical management
1998
Effects of Induced Hypertension on Transcranial Doppler Ultrasound Velocities in Patients After Subarachnoid Hemorrhage
Manno E, Gress D, Schwamm L, Diringer M, Ogilvy C. Effects of Induced Hypertension on Transcranial Doppler Ultrasound Velocities in Patients After Subarachnoid Hemorrhage. Stroke 1998, 29: 422-428. PMID: 9472884, DOI: 10.1161/01.str.29.2.422.Peer-Reviewed Original ResearchConceptsMiddle cerebral arteryInduced hypertensionTCD velocitiesSubarachnoid hemorrhageTranscranial Doppler ultrasoundIntact autoregulationArterial pressureCerebral vasospasmCerebral arteryCerebral autoregulationTranscranial Doppler ultrasound velocitiesCerebral blood flow velocityContinuous TCD monitoringMean arterial pressureBlood flow velocityLevel of autoregulationDoppler ultrasound velocitiesAdditional patientsClinical evidenceClinical differencesTCD monitoringHypertensionDoppler ultrasoundHemorrhagePatients