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Prevalence, natural history, and time-dependent outcomes of a multi-center North American cohort of out-of-hospital cardiac arrest extracorporeal CPR candidates.
Pubmed ID: 28552656
Journal: Resuscitation
Publication Date: Aug. 1, 2017
Affiliation: Department of Emergency Medicine, University of Pittsburgh, Pittsburgh, PA, United States.
MeSH Terms: Humans, Male, Adult, Female, Cohort Studies, Logistic Models, Middle Aged, Prevalence, Treatment Outcome, Time Factors, Cardiopulmonary Resuscitation, Emergency Medical Services, North America, Out-of-Hospital Cardiac Arrest, Extracorporeal Membrane Oxygenation
Grants: K12 HL109068
Authors: Reynolds JC, Grunau BE, Rittenberger JC, Sawyer KN, Kurz MC, Callaway CW, Elmer J, Singer B, Proudfoot A
Cite As: Reynolds JC, Grunau BE, Elmer J, Rittenberger JC, Sawyer KN, Kurz MC, Singer B, Proudfoot A, Callaway CW. Prevalence, natural history, and time-dependent outcomes of a multi-center North American cohort of out-of-hospital cardiac arrest extracorporeal CPR candidates. Resuscitation 2017 Aug;117:24-31. Epub 2017 May 25.
Studies:
- Resuscitation Outcomes Consortium (ROC) Amiodarone, Lidocaine or Neither for Out-Of-Hospital Cardiac Arrest Due to Ventricular Fibrillation or Ventricular Tachycardia (ALPS)
- Resuscitation Outcomes Consortium (ROC) Prehospital Resuscitation Using an Impedance Valve and Early Versus Delayed Analysis (PRIMED)
Abstract
AIM: Estimate prevalence of ECPR-eligible subjects in a large, North American, multi-center cohort, describe natural history with conventional resuscitation, and predict optimal timing of transition to ECPR. METHODS: Secondary analysis of clinical trial enrolling adults with non-traumatic OHCA. Primary outcome was survival to discharge with favorable outcome (mRS 0-3). Subjects were additionally classified as survival with unfavorable outcome (mRS 4-5), ROSC without survival (mRS 6), or without ROSC. We plotted subject accrual as a function of resuscitation duration (CPR onset to return of spontaneous circulation (ROSC) or termination of resuscitation), and estimated time-dependent probabilities of ROSC and mRS 0-3 at discharge. Adjusted logistic regression models tested the association between resuscitation duration and survival with mRS 0-3. RESULTS: Of 11,368 subjects, 1237 (10.9%; 95%CI 10.3-11.5%) were eligible for ECPR, Of these, 778 (63%) achieved ROSC, 466 (38%) survived to discharge, and 377 (30%) had mRS 0-3 at discharge. Half with eventual mRS 0-3 achieved ROSC within 8.8min (95%CI 8.3-9.2min) of resuscitation, and 90% within 21.0min (95%CI 19.1-23.7min). Time-dependent probabilities of ROSC and mRS 0-3 declined over elapsed resuscitation, and the likelihood of additional cases with mRS 0-3 beyond 20min was 8.4% (95%CI 5.9-11.0%). Resuscitation duration was independently associated with survival to discharge with mRS 0-3 (OR 0.95; 95%CI 0.92-0.97). CONCLUSION: Approximately 11% of subjects were eligible for ECPR. Only one-third survived to discharge with favorable outcome. Performing 9-21min of conventional resuscitation captured most ECPR-eligible subjects with eventual mRS 0-3 at hospital discharge.