Medical Emergencies at Altitude : An Evidence-based Review of Epidemiology, Management and Advances in Aviation Medicine

Abstract

Background : In-flight medical emergencies (IMEs) represent a critical intersection of clinical medicine, public health, and aviation logistics, occurring within a uniquely challenging environment characterized by physiological stress, limited resources, and confined spaces. These incidents are further exacerbated by the context of a 2025 peak in global air travel, which has intensified the frequency and complexity of medical events at altitude. Additionally, this review considers the lasting impact of the pandemic in shifting IME patterns, noting a marked increase in presentations related to psychological distress and the implementation of enhanced infectious disease protocols onboard aircraft. This review aims to synthesize current evidence on the epidemiology, etiology, and management of IMEs, while evaluating the impact of recent global developments—including the post-pandemic travel surge and evolving aviation medicine technologies—on clinical outcomes and operational protocols. Methods : This narrative review was conducted in accordance with the SANRA guidelines. A comprehensive literature search was performed using PubMed, Scopus, Web of Science, and Google Scholar for articles published between January 2000 and December 2025. Keywords included "in-flight medical emergencies," "aviation medicine," "cardiac arrest," and related terms. Two independent reviewers screened articles, with disagreements resolved by a third reviewer. Results : A total of 28 articles met the inclusion criteria. The literature reveals an estimated incidence of 24 to 130 events per million passengers, with syncopal episodes constituting the most frequent presentation, while acute cardiac events, though less common, carry the highest mortality risk and operational impact. Successful management relies on a triad of prepared cabin crew utilizing standardized emergency equipment, ground-based telemedical consultation, and, increasingly, the voluntary assistance of passenger healthcare professionals. Conclusion : Persistent challenges include variability in crew training protocols, legal ambiguities for volunteer responders, and the integration of emerging technologies. This article consolidates current knowledge to inform clinical practice, guide policy development, and identify critical research gaps for improving outcomes in this specialized domain of travel medicine.