2011
Physician Procedure Volume and Complications of Cardioverter-Defibrillator Implantation
Freeman JV, Wang Y, Curtis JP, Heidenreich PA, Hlatky MA. Physician Procedure Volume and Complications of Cardioverter-Defibrillator Implantation. Circulation 2011, 125: 57-64. PMID: 22095828, DOI: 10.1161/circulationaha.111.046995.Peer-Reviewed Original ResearchConceptsPhysician procedure volumeProcedure volumeHospital mortalityICD implantationHospital characteristicsPhysician specialtyNational Cardiovascular Data Registry ICD RegistryImplantable cardioverter-defibrillator placementInitial ICD implantationRate of complicationsCardioverter-defibrillator implantationHospital procedure volumeClustering of patientsAnnual procedure volumeOutcomes of proceduresVolume of proceduresHierarchical logistic regressionHospital complicationsComplication rateHospital volumePatient characteristicsProcedural complicationsHighest quartileInverse relationshipComplications
2003
Patient characteristics associated with underuse of angiotensin-converting enyzme inhibitors among elderly medicare beneficiaries hospitalized for heart failure
Rathore S, Masoudi F, Wang Y, Foody J, Havranek E, Krumholz H. Patient characteristics associated with underuse of angiotensin-converting enyzme inhibitors among elderly medicare beneficiaries hospitalized for heart failure. Journal Of Cardiac Failure 2003, 9: s85. DOI: 10.1016/s1071-9164(03)00153-2.Peer-Reviewed Original ResearchElderly Medicare beneficiariesPatient characteristicsHeart failureMedicare beneficiariesAngiotensinUnderuse
2001
Acute myocardial infarction in the elderly: differences by age
Mehta R, Rathore S, Radford M, Wang Y, Wang Y, Krumholz H. Acute myocardial infarction in the elderly: differences by age. Journal Of The American College Of Cardiology 2001, 38: 736-741. PMID: 11527626, DOI: 10.1016/s0735-1097(01)01432-2.Peer-Reviewed Original ResearchConceptsAcute myocardial infarctionAge-associated differencesElderly patientsClinical characteristicsAge groupsMyocardial infarctionThirty-day mortality rateMedicare beneficiaries ageOne-year mortalityPrior coronary diseaseProportion of patientsST-segment elevationOlder age groupsSignificant age-associated differencesChest painEffect of ageOlder patientsRenal insufficiencyCoronary diseaseHeart failureHospital admissionPatient characteristicsSuccessive age groupsSymptom onsetDiabetic patients
1999
Comparing AMI Mortality Among Hospitals in Patients 65 Years of Age and Older
Krumholz H, Chen J, Wang Y, Radford M, Chen Y, Marciniak T. Comparing AMI Mortality Among Hospitals in Patients 65 Years of Age and Older. Circulation 1999, 99: 2986-2992. PMID: 10368115, DOI: 10.1161/01.cir.99.23.2986.Peer-Reviewed Original ResearchConceptsAcute myocardial infarctionMyocardial infarctionWhite blood cell countPatients 65 yearsSystolic blood pressureCongestive heart failureMedical chart reviewReceiver-operating characteristic curveBlood cell countRisk-adjusted outcomesYears of ageAdministrative billing codesRisk-adjustment modelsHospital outcomesSerum creatinineChart reviewDerivation cohortHeart failurePatient characteristicsBlood pressureCardiac arrestValidation cohortCandidate predictor variablesAMI mortalityBilling codes