Survival and Neurological Outcome After Out-of-hospital Cardiac Arrest Treated with and Without Mechanical Circulatory Support

Overview

Journal Resusc Plus

Date 2022 Apr 18

PMID 35434669

Authors

Sivagowry Rasalingam Mork

Morten Thingemann Botker

Steffen Christensen

Mariann Tang

Christian Juhl Terkelsen

Affiliations

Soon will be listed here.

Abstract

Aim: The aim of this study was to describe the survival and neurological outcome in patients with OHCA treated with and without mechanical circulatory support (MCS).

Methods: This was a retrospective observational cohort study on patients with OHCA admitted to Aarhus University Hospital, Denmark, between January 2015 and December 2019. Kaplan-Meier estimates were used to evaluate 30-day and 30-180-day survival. Cox regression analysis was used to assess the association between covariates and one-year mortality.

Results: Among 1,015 patients admitted, 698 achieved return of spontaneous circulation (ROSC) before admission, 101 patients with refractory OHCA received mechanical circulatory support (MCS) and the remaining 216 patients with refractory OHCA did not receive MCS treatment. Survival to hospital discharge was 47% (478/1015). Good neurological outcome defined as Cerebral Performance Categories 1-2 were seen among 92% (438/478) of the patients discharged from hospital. Median low-flow was 15 [8-22] minutes in the ROSC group and 105 [94-123] minutes in the MCS group. Mortality rates were high within the first 30 days, however; 30-180-day survival in patients discharged remained constant over time in both patients with ROSC on admission and patients admitted with MCS. Advanced age > 70 years (hazard ratio (HR) 1.98, 95% confidence interval (CI) 1.11-3.49), pulseless electrical activity (HR 2.39, 95% CI 1.25-4.60) and asystole HR 2.70, 95% CI 1.25-5.95) as initial rhythms were associated with one-year mortality in patients with ROSC.

Conclusions: Short-term survival rates were high among patients with ROSC and patients receiving MCS. Among patients who survived to day 30, landmark analyses showed comparable 180-day survival in the two groups despite long low-flow times in the MCS group. Advanced age and initial non-shockable rhythms were independent predictors of one-year mortality in patients with ROSC on admission.

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