Abstract WP292: Temporal Trends in the Use of Ems Service as a Mode of Arrival by Acute Ischemic Stroke Patients

Abstract

Intro: Utilization of emergency medical services (EMS) can increase the likelihood of appropriate therapy with IV tPA or endovascular intervention. We investigate the use of EMS services in three large states across the US during the past decade. Methods: Using GWTG stroke registry data from three large comprehensive stroke centers in the Northeast, South and West, we analyzed 9,251 stroke admissions from 01/2010 - 12/2018. Overall rates of EMS use and temporal trends were computed. Factors associated with EMS use were evaluated with univariate analysis. Results: Of the 9,251 patients, 29.2 % (2,697/9,251) presented via EMS service. Overtime use of EMS service increased from 29% in 2010-11 to 34% in 2018. Use of EMS increased among severe stroke patients but decreased among mild stroke patients. Patients presenting via EMS were older, more often females while less often African Americans. They had more stroke risk factors, including hypertension, diabetes, atrial fibrillation and previous stroke/TIA. Smokers less often use EMS services. Median NIHSS was higher among patients presenting via EMS, and those with altered level of consciousness used EMS more often. In-hospital intervention rates (IV tPA/endovascular) were higher among patients presenting via EMS. Conclusion: Our results showed that after extensive EMS education in most parts of the study states, stroke presentation has increased via EMS overtime. Disparity in the use of EMS still exists with African Americans using the service less often. Patients should be encouraged to use EMS services and decrease delay in presentation which can results in higher rates of intervention.