Long-Term Survival Trends of Medicare Patients After In-Hospital Cardiac Arrest: Insights from Get With The Guidelines-Resuscitation®

Abstract Background Although rates of survival to hospital discharge after in-hospital cardiac arrest (IHCA) have improved over the last decade, it is unknown if these survival gains are sustained after hospital discharge. Objective To examine 1-year survival trends overall and by rhythm after IHCA. Methods Using Medicare beneficiaries (age ≥ 65 years) with IHCA occurring between 2000 and 2011 at Get With The Guidelines®-Resuscitation Registry participating hospitals we used multivariable regression, to examine temporal trends in risk-adjusted rates of 1-year survival. Results Among 45,567 patients with IHCA, the unadjusted 1-year survival was 9.4%. Unadjusted 1-year survival was 21.8% among the 9,223 (20.2%) of patients with Ventricular Fibrillation or Pulseless Ventricular Tachycardia (VF/VT) and 6.2% among the 36,344 (79.8%) of patients with Pulseless Electrical Activity or asystole (PEA/asystole). After adjustment for patient and arrest characteristics, 1-year survival increased over time for all IHCA from 8.9% in 2000–2001 to 15.2% in 2011 (adjusted rate ratio [RR] per year, 1.05; 95% CI, 1.03–1.06; P  Conclusion Among Medicare beneficiaries in the GWTG-Resuscitation registry, 1-year survival after IHCA has increased for over the past decade. Temporal improvements in survival were noted for both shockable and non-shockable presenting arrest rhythms.