• Lauren E Thompson, Paul S Chan, Fengming Tang, Brahmajee K Nallamothu, Saket Girotra, Sarah M Perman, Somnath Bose, Stacie L Daugherty, Steven M Bradley, and American Heart Association’s Get With the Guidelines-Resuscitation Investigators.
• University of Colorado, Department of Cardiology, Aurora, CO, United States. Electronic address: Lauren.thompson@ucdenver.edu.
• Resuscitation. 2018 Feb 1; 123: 58-64.

BackgroundAlthough 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.ObjectiveTo examine 1-year survival trends overall and by rhythm after IHCA.MethodsUsing Medicare beneficiaries (age≥65years) 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.ResultsAmong 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<0.001 for trend). Improvements in 1-year risk adjusted survival were also observed for VF/VT (19.4% in 2000-2001 to 25.6% in 2011 [RR per year, 1.02; 95% CI, 1.01-1.04; P 0.004 for trend]) and PEA/asystole arrests (4.7% in 2000-2001 to 10.2% in 2011 [RR per year, 1.07; 95% CI, 1.05-1.08; P<0.001 for trend]).ConclusionAmong 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.Copyright © 2017 Elsevier B.V. All rights reserved.

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