RESUMO
BACKGROUND: In 2005, Orange County California Emergency Medical Services (EMS) initiated a field 12-lead program to minimize time to emergency percutaneous coronary intervention (PCI) for field-identified acute myocardial infarction (MI). As the program matured, "false-positive" (defined as no PCI or coronary artery occlusion upon PCI) field MI activations have been identified as a problem for the program. OBJECTIVES: To identify potentially correctable factors associated with false-positive EMS triage to PCI centers. METHODS: This was a retrospective, outcome study of EMS 12-lead cases from February 2006 to June 2007. The study system exclusively used cardiac monitor internal interpretation algorithms indicating an acute myocardial infarction as the basis for triage. Indicators and variables were defined prior to the study. Data, including outcome, was from the Orange County EMS database, which included copies of 12-lead ECGs used for field triage. Negative odds ratios (OR) of less than 1.0 for positive PCI were the statistical measure of interest. RESULTS: Five hundred forty-eight patients were triaged from the field for PCI. We excluded 19 cases from the study because of death prior to PCI, refusal of PCI, and co-morbid illness (sepsis, altered consciousness) that precluded PCI. Three hundred ninety-three (74.3%) patients had PCI with significant coronary lesions found. False-positive field triages were associated with underlying cardiac rhythm of sinus tachycardia [OR = 0.38 (95% CI 0.23, 0.62)]; atrial fibrillation [OR = 0.43 (95% CI = 0.20, 0.94)]; an ECG lead not recorded [OR = 0.39 (95% CI = 0.20, 0.76)]; poor ECG baseline [OR = 0.59 (95% CI = 0.25, 1.37)]; One of three brands of monitors used in the field [OR = 0.35 (95% CI = 0.21, 0.59)]; and female gender [OR = 0.50 (95% CI = 0.34, 0.75)]. Age was not associated with false-positive triage as determined by ordinal regression (p=1.00). CONCLUSION: For the urban-suburban EMS field 12-lead program studied, age was not associated with false-positive triage. It was unexpected that female gender was associated with false-positive triage. False-positive triage from the field was associated with poor ECG acquisition, underlying rhythms of atrial fibrillation and sinus tachycardia, and one brand of 12-lead monitor.
RESUMO
OBJECTIVES: The aim of this study was to evaluate the rate of timely reperfusion for ST-elevation myocardial infarction (STEMI) with primary percutaneous coronary intervention (PPCI) in regional STEMI Receiving Center (SRC) networks. BACKGROUND: The American College of Cardiology Door-to-Balloon (D2B) Alliance target is a >75% rate of D2B Assuntos
Angioplastia Coronária com Balão
, Prestação Integrada de Cuidados de Saúde
, Eletrocardiografia
, Serviços Médicos de Emergência
, Acessibilidade aos Serviços de Saúde
, Infarto do Miocárdio/diagnóstico
, Infarto do Miocárdio/terapia
, Programas Médicos Regionais
, Ambulâncias
, Prestação Integrada de Cuidados de Saúde/organização & administração
, Serviços Médicos de Emergência/organização & administração
, Fidelidade a Diretrizes
, Acessibilidade aos Serviços de Saúde/organização & administração
, Humanos
, Objetivos Organizacionais
, Guias de Prática Clínica como Assunto
, Estudos Prospectivos
, Programas Médicos Regionais/organização & administração
, Sistema de Registros
, Fatores de Tempo
, Triagem
, Estados Unidos