title: Comparison of the Effectiveness of Stress Echocardiography Versus Myocardial Perfusion Imaging in Patients Presenting to the Emergency Department With Low-Risk Chest Pain.
abstract: The aim of this study was to compare clinically relevant cardiovascular outcomes and downstream resource utilization associated with stress echocardiography (SE) and myocardial perfusion imaging (MPI) in emergency department patients with low-risk chest pain. This was a retrospective analysis of health insurance claims data for a national sample of privately insured patients over the period January 1 to December 31, 2011. Subjects were selected who presented to the emergency department with a primary or secondary diagnosis of chest pain and underwent either SE or MPI. The primary end points were the percentage of patients in each group who underwent downstream cardiac catheterization, revascularization, repeat noninvasive testing, return emergency department visit with chest pain, and hospitalization for myocardial infarction. The mean length of follow-up was 190 days in both groups. Overall, 48,202 patients or 24,101 propensity-matched pairs were included in the final analysis. Compared with SE, MPI was associated with significantly higher odds of subsequent cardiac catheterization (adjusted odds ratio [AOR] 2.15; 95% confidence interval [CI] 1.99 to 2.33) and revascularization procedures (AOR 1.58; 95% CI 1.36 to 1.85) and repeat emergency department visits (AOR 1.14; 95% CI 1.11 to 1.19). The odds of repeat testing and myocardial infarction did not differ between groups. The average cost of downstream care was significantly higher in the MPI group ($2,193.80 vs $1,631.10, p <0.0001). According to the a priori rules specified for this comparative analysis, SE is more effective than MPI for privately insured patients who present to the emergency department with chest pain. In conclusion, these findings demonstrate the importance of assessing diagnostic tests based on how they affect hard end points because identification of disease, in and of itself, may not confer any clinical advantage.
authors.affiliation: Division of Cardiology, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania.
authors.forename: Rhian
authors.initials: R
authors.lastname: Davies
authors.affiliation: Department of Public Health Sciences, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania.
authors.forename: Guodong
authors.initials: G
authors.lastname: Liu
authors.affiliation: Department of Public Health Sciences, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania; Division of Internal Medicine, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania.
authors.forename: Christopher
authors.initials: C
authors.lastname: Sciamanna
authors.affiliation: Division of Cardiology, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania.
authors.forename: William R
authors.initials: WR
authors.lastname: Davidson
authors.affiliation: Department of Public Health Sciences, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania.
authors.forename: Douglas L
authors.initials: DL
authors.lastname: Leslie
authors.affiliation: Division of Cardiology, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania; Department of Public Health Sciences, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania. Electronic address: afoy@hmc.psu.edu.
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Foy
mesh_terms: D000328:Adult; D006328:Cardiac Catheterization / Q000706:statistics & numerical data; D002637:Chest Pain / Q000000981:diagnostic imaging* / Q000209:etiology; D003324:Coronary Artery Disease / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery; D016208:Databases, Factual; D025401:Echocardiography, Stress; D004636:Emergency Service, Hospital; D005260:Female; D017048:Health Care Costs; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D007348:Insurance, Health; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000453:epidemiology; D055414:Myocardial Perfusion Imaging; D009204:Myocardial Revascularization; D012189:Retrospective Studies; D014481:United States / Q000453:epidemiology