Impact of timing parameters on outcomes following extracorporeal cardiopulmonary resuscitation: a systematic review and meta-analysis

Q: What is the clinical evidence from this study?

Study design: Meta-Analysis. Population: Refractory in-hospital and out-of-hospital cardiac arrest (n=2199). Intervention: Shorter low-flow duration (<45 minutes) during extracorporeal cardiopulmonary resuscitation (ECPR) vs. Longer low-flow duration (≥45 minutes) during ECPR. Primary outcome: Survival at hospital discharge (p=0.034).

Q: What does this research mean for the field?

In extracorporeal cardiopulmonary resuscitation (ECPR), a low-flow duration under 45 minutes is significantly associated with improved survival to discharge and favorable neurological outcomes. Novelty: ClaimNovelty.SYNTHESIS. Consensus alignment: ConsensusAlignment.NEUTRAL.

Q: What question did this study set out to answer?

To identify optimal timing thresholds and evaluate how critical time intervals influence survival and neurological outcomes after extracorporeal cardiopulmonary resuscitation (ECPR).

Clara Alverina; Safina Fairuz Salwaa; Muhammad Fadhil Kamaruddin; Bambang Pujo Semedi; Soni Sunarso Sulistiawan; Kun Arifi Abbas; Liong Liem

doi:10.62838/jccm-2026-0049

October 30, 2026The Journal of Critical Care MedicineOpen Access

Impact of timing parameters on outcomes following extracorporeal cardiopulmonary resuscitation: a systematic review and meta-analysis

View Full Paper

Ask AI

Bookmark

Share

Why the study?

Extracorporeal cardiopulmonary resuscitation is a promising intervention for refractory cardiac arrest, but the impact of critical time intervals and optimal timing thresholds on patient outcomes remains debated.

Does shorter low-flow duration (<45 minutes) improve survival at discharge and neurological outcomes in patients undergoing extracorporeal cardiopulmonary resuscitation for refractory cardiac arrest?

Key Points

To identify optimal timing thresholds and evaluate how critical time intervals influence survival and neurological outcomes after extracorporeal cardiopulmonary resuscitation (ECPR).
Conducted a systematic review and meta-analysis per PRISMA guidelines encompassing 23 studies (n=3,196) published between 2015 and 2024.
Evaluated critical intervals including no-flow duration, low-flow duration (LFD), and time from cardiac arrest to ECMO initiation against survival at discharge and Cerebral Performance Category scores.
Patients with low-flow duration under 45 minutes showed significantly higher survival at discharge (32% vs. 23%, p = 0.034) and favorable neurological outcomes (26% vs. 20%, p = 0.046).
Meta-regression demonstrated an inverse association between low-flow duration and survival (p = 0.060; R² = 0.540) and a trend toward improved neurological outcomes (p = 0.055; R² = 0.643).
Outcomes declined markedly when low-flow duration exceeded 70 minutes in out-of-hospital cardiac arrest, whereas no-flow duration and overall arrest-to-ECMO intervals showed non-significant associations.

Study Design

Type

Meta-Analysis (n=2,199)

Multicenter

Yes

Structured PICO

Does shorter low-flow duration (<45 minutes) improve survival at discharge and neurological outcomes in patients undergoing extracorporeal cardiopulmonary resuscitation for refractory cardiac arrest?

P

Population

23 studies (2,199 adults, predominantly male, mean/median age 50-60 years) with refractory non-traumatic in-hospital or out-of-hospital cardiac arrest treated with ECPR, assessed through hospital discharge.

E

Exposure

Extracorporeal cardiopulmonary resuscitation (ECPR) evaluated by critical timing intervals: no-flow duration (NFD), low-flow duration (LFD, specifically <45 minutes), and time from cardiac arrest to ECMO initiation (CA-to-ECMO, specifically <50 minutes).

C

Comparator

Longer critical timing intervals during ECPR (e.g., low-flow duration ≥45 minutes or >70 minutes).

O

Outcome

Survival at hospital discharge and neurological status assessed using the Cerebral Performance Category (CPC) scale.hard clinical

Main Result

Absolute Event Rate: 32% vs 23%

p-value: p=0.034

Limitations

Substantial clinical and statistical heterogeneity across included studies (I² up to 79.7%)
Predominance of retrospective, single-center observational studies susceptible to selection bias and residual confounding
Aggregate study-level meta-regression is subject to ecological fallacy and cannot establish patient-level dose-response causality
Small number of studies reporting continuous no-flow duration (n=8), limiting statistical power
Pairwise deletion for missing timing data and lack of formal publication bias testing for most outcomes (k < 10)
Overall low to very low GRADE certainty of evidence

Ask about this paper

Answers are grounded in this paper and cite their sources.

Implication

In patients undergoing ECPR for refractory cardiac arrest, achieving a low-flow duration of less than 45 minutes is significantly associated with improved survival at discharge and favorable neurological outcomes.

Abstract

Background: Cardiac arrest remains a significant public health problem with high mortality. Extracorporeal cardiopulmonary resuscitation (ECPR) has emerged as a promising intervention for refractory cardiac arrest but, the impact of the critical time intervals on outcomes remains debated. This study investigates optimal timing thresholds and impact of critical time intervals to patients outcomes following ECPR. Methods: A systematic review and meta-analysis was conducted per PRISMA guidelines, including 23 studies (n=3.196) published between 2015-2024. Evaluated time intervals included no-flow duration (NFD), low-flow duration (LFD), and time from cardiac arrest to ECMO initiation (CA-to-ECMO). Outcomes assessed included neurological status using the Cerebral Performance Category (CPC) scale, survival at discharge, and hospital stay duration. Results: Patients with LFD <45 minutes showed significantly higher survival at discharge (32% vs. 23%, p = 0.034) and favorable neurological outcomes (26% vs. 20%, p = 0.046). Meta-regression demonstrated a strong inverse association between LFD and survival (p = 0.060; R² = 0.540) and a trend toward improved neurological outcomes (p = 0.055; R² = 0.643). Longer NFD was linked with poorer outcomes but without statistical significance. Arrest-to-ECMO time showed non-significant associations, with best results when <50 minutes. Subgroup analysis revealed stricter LFD thresholds correlated with improved outcomes for IHCA, while OHCA declined markedly when LFD exceeded 70 minutes. Conclusions: LFD is strongly associated with outcomes in ECPR with best results occur when LFD is <45 minutes. Location-specific timing thresholds and rapid ECMO deployment may be essential to maximizing outcomes.

Discussion

No takes yet. Share an insight, caveat, or question.

Cite This Study

Alverina et al. (2026) conducted a meta-analysis in Refractory in-hospital and out-of-hospital cardiac arrest (n=2,199). Shorter low-flow duration (<45 minutes) during extracorporeal cardiopulmonary resuscitation (ECPR) vs. Longer low-flow duration (≥45 minutes) during ECPR was evaluated on Survival at hospital discharge (p=0.034).

synapsesocial.com/papers/6aee6bd871a7594806220bca https://doi.org/10.62838/jccm-2026-0049

View Full Paper

Ask AI

Bookmark

Share

Impact of timing parameters on outcomes following extracorporeal cardiopulmonary resuscitation: a systematic review and meta-analysis

Key Points

Study Design

Structured PICO

Main Result

Limitations

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

Impact of timing parameters on outcomes following extracorporeal cardiopulmonary resuscitation: a systematic review and meta-analysis

Key Points

Study Design

Structured PICO

Main Result

Limitations

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

Keep reading

Keep reading