2022
Unsupervised machine learning improves risk stratification of patients with visual normal SPECT myocardial perfusion imaging assessments
Bednarski B, Williams M, Pieszko K, Miller R, Huang C, Kwiecinski J, Sharir T, Di Carli M, Fish M, Ruddy T, Hasuer T, Miller E, Acampa W, Berman D, Slomka P. Unsupervised machine learning improves risk stratification of patients with visual normal SPECT myocardial perfusion imaging assessments. European Heart Journal 2022, 43: ehac544.300. DOI: 10.1093/eurheartj/ehac544.300.Peer-Reviewed Original ResearchMajor adverse cardiac eventsPeak systolic blood pressureSystolic blood pressureHigh-risk clustersRisk stratificationMyocardial perfusion imagingNormal perfusionHazard ratioBlood pressureCox proportional hazards analysisHigher left ventricular massHigher body mass indexTomography myocardial perfusion imagingNormal clinical assessmentRisk-stratified subgroupsAdverse cardiac eventsPrevalence of diabetesProportional hazards analysisBetter risk stratificationCoronary artery diseaseImproved risk stratificationManagement of patientsKaplan-Meier curvesBody mass indexLeft ventricular mass
2020
Automated quantitative analysis of CZT SPECT stratifies cardiovascular risk in the obese population: Analysis of the REFINE SPECT registry
Klein E, Miller RJH, Sharir T, Einstein AJ, Fish MB, Ruddy TD, Kaufmann PA, Sinusas AJ, Miller EJ, Bateman TM, Dorbala S, Di Carli M, Otaki Y, Gransar H, Liang JX, Dey D, Berman DS, Slomka PJ. Automated quantitative analysis of CZT SPECT stratifies cardiovascular risk in the obese population: Analysis of the REFINE SPECT registry. Journal Of Nuclear Cardiology 2020, 29: 727-736. PMID: 32929639, PMCID: PMC8497048, DOI: 10.1007/s12350-020-02334-7.Peer-Reviewed Original ResearchConceptsBody mass indexTotal perfusion deficitStress total perfusion deficitMyocardial perfusion imagingSPECT myocardial perfusion imagingPrognostic accuracyObese populationMajor adverse cardiac event risksCox proportional hazards analysisDifferent obesity categoriesRobust risk stratificationCardiac event riskProportional hazards analysisHigher prognostic accuracyREFINE SPECT registrySoft tissue attenuationQuantitative perfusion analysisMACE riskObesity categoriesCardiovascular riskObese patientsAdjusted analysisMass indexRisk stratificationSignificant obesity
2019
Transient ischaemic dilation and post-stress wall motion abnormality increase risk in patients with less than moderate ischaemia: analysis of the REFINE SPECT registry.
Miller RJH, Hu LH, Gransar H, Betancur J, Eisenberg E, Otaki Y, Sharir T, Fish MB, Ruddy TD, Dorbala S, Carli MD, Einstein AJ, Kaufmann PA, Sinusas AJ, Miller EJ, Bateman T, Germano G, Tamarappoo BK, Dey D, Berman DS, Slomka PJ. Transient ischaemic dilation and post-stress wall motion abnormality increase risk in patients with less than moderate ischaemia: analysis of the REFINE SPECT registry. European Heart Journal - Cardiovascular Imaging 2019, 21: 567-575. PMID: 31302679, PMCID: PMC7167750, DOI: 10.1093/ehjci/jez172.Peer-Reviewed Original ResearchConceptsMajor adverse cardiovascular eventsTransient ischemic dilationWall motion abnormalitiesModerate ischaemiaMyocardial perfusion imagingMild ischaemiaIschemic dilationMultivariable Cox proportional hazards analysisHigh-risk imaging featuresCox proportional hazards analysisTomography myocardial perfusion imagingAdverse cardiovascular eventsHigh-risk featuresGroup of patientsProportional hazards analysisIncremental prognostic utilityTotal perfusion deficitREFINE SPECT registrySingle photon emissionMedian followCardiovascular eventsCardiovascular riskMultivariable analysisPrognostic utilityPerfusion deficits5-Year Prognostic Value of Quantitative Versus Visual MPI in Subtle Perfusion Defects Results From REFINE SPECT
Otaki Y, Betancur J, Sharir T, Hu LH, Gransar H, Liang JX, Azadani PN, Einstein AJ, Fish MB, Ruddy TD, Kaufmann PA, Sinusas AJ, Miller EJ, Bateman TM, Dorbala S, Di Carli M, Tamarappoo BK, Germano G, Dey D, Berman DS, Slomka PJ. 5-Year Prognostic Value of Quantitative Versus Visual MPI in Subtle Perfusion Defects Results From REFINE SPECT. JACC Cardiovascular Imaging 2019, 13: 774-785. PMID: 31202740, PMCID: PMC6899217, DOI: 10.1016/j.jcmg.2019.02.028.Peer-Reviewed Original ResearchConceptsMajor adverse cardiac eventsTotal perfusion deficitStress total perfusion deficitMACE rateHazard ratioRate of MACECox proportional hazards analysisTomography myocardial perfusion imagingAdjusted hazard ratioAdverse cardiac eventsNonfatal myocardial infarctionProportional hazards analysisMyocardial perfusion imagingSingle photon emissionCardiac eventsLate revascularizationUnstable anginaRisk stratificationPrognostic valueKaplan-MeierPerfusion abnormalitiesPerfusion deficitsMyocardial infarctionPrognostic studiesMyocardial perfusion