The dynamic pathophysiology of post cardiac arrest brain injury: "time is brain".

IF 3.5 3区医学 Q1 CRITICAL CARE MEDICINE

Current Opinion in Critical Care Pub Date : 2025-02-28 DOI:10.1097/MCC.0000000000001246

Chloe P Allen, Jordan D Bird, Mypinder S Sekhon

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引用次数: 0

Abstract

Purpose of review: To review the time dependent nature of postcardiac arrest brain injury (PCABI) while contextualizing clinical trial evidence.

Recent findings: PCABI represents a dynamic entity with respect to its pathophysiology. Intuitively, PCABI pathophysiology has been characterized focusing on mechanisms associated with cerebral ischemia. Interventions that augment cerebral oxygen delivery, such as increasing mean arterial pressure, have garnered interest. Regrettably, these trials have not demonstrated improved outcomes. At the core of this conundrum is the time dependent nature of PCABI pathophysiology with trials employing interventions approximately 4-6 h after return of spontaneous circulation (ROSC). This therapeutic window is likely far past the efficacy period of resumption of oxygen delivery to the ischemic brain. Thus, we suggest compartmentalizing PCABI into four phases: circulatory arrest; intra-arrest physiology; immediate reperfusion; and delayed reperfusion. Culprit mechanisms are discussed for each phase with contextualization of recent trial results.

Summary: PCABI has dynamic pathophysiology and restoration of cerebral oxygen delivery in a delayed manner from ROSC has diminished efficacy. PCABI pathophysiology must be viewed in a time dependent manner and interventions aimed at restoring cerebral oxygen delivery are likely only to be efficacious if applied immediately after ROSC.

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来源期刊

Current Opinion in Critical Care 医学-危重病医学

CiteScore

5.90

自引率

3.00%

发文量

172

审稿时长

6-12 weeks

期刊介绍： Current Opinion in Critical Care delivers a broad-based perspective on the most recent and most exciting developments in critical care from across the world. Published bimonthly and featuring thirteen key topics – including the respiratory system, neuroscience, trauma and infectious diseases – the journal’s renowned team of guest editors ensure a balanced, expert assessment of the recently published literature in each respective field with insightful editorials and on-the-mark invited reviews.