Managing cardiac arrest in the intensive care unit.

PURPOSE OF REVIEW: This review aims to explore the distinct clinical characteristics, epidemiology, treatment approaches, and research needs concerning cardiac arrest in the intensive care unit (ICU-CA), a specific subset of in-hospital cardiac arrest (IHCA). While IHCA remains a major cause of mortality, recent data indicate improved outcomes, with a notable variation in incidence and survival depending on the location, particularly within the ICU setting.

RECENT FINDINGS: Recent studies underscore that ICU-CA differs significantly from general IHCA in etiology, monitoring, and treatment environment. Although incidence rates vary widely (4-78 per 1000 ICU admissions), recent data suggest a stabilization. Causes of ICU-CA often involve noncardiac factors such as septic shock and respiratory failure. Treatment is typically guided by general advanced life support (ALS) protocols, but ICU-specific resources such as real-time monitoring, invasive pressure measurements, transesophageal echocardiography, and the potential for extracorporeal cardiopulmonary resuscitation offer unique advantages. The COVID-19 pandemic highlighted the vulnerability of ICU patients, with respiratory causes dominating and extremely poor outcomes reported.

SUMMARY: In summary, ICU-CA represents a distinct clinical entity requiring tailored research. Future directions should prioritize international registries, validation of predictive models using artificial intelligence, and clarification of do-not-resuscitate practices to improve outcomes and resource allocation in this critically ill population.