Cardiac Arrest in Flight: A Retrospective Chart Review of 92 Patients Transported by a Critical Care Air Medical Service

Hearts in the sky: understanding the cardiovascular implications of air travel

Air travel is widely regarded as the safest mode of transportation, with the United States leading in airline passengers. However, travelers with pre-existing heart conditions face acute cardiovascular risks. Flight pilots and cabin crew are particularly vulnerable to air travel's physiological changes, which can significantly impair their health and performance. Cabin pressure differences and reduced oxygen levels at cruising altitudes of 5000-8000 feet make air travel challenging for individuals with underlying cardiac and pulmonary problems. This, along with dry air, sleep deprivation, missed medication and prolonged sitting, can lead to physiological changes. In-flight and pre-flight stressors contribute to increased health issues, and studies show a rise in medical emergencies during flights. Prolonged exposure to the airplane environment can lead to various health issues for pilots and cabin crew. These changes include impaired judgment, cognitive function and discomfort in the sinuses and ears due to pressure differentials. Therefore, thorough medical screening, skilled instrument use and compliance with safety measures are essential to mitigate these risks. This article reviews the cardiac implications of air travel, discussing the underlying pathophysiology, associated risks and preventive measures to ensure safer flights for individuals with cardiovascular diseases.

Patients Air Medical Transport During the COVID-19 Pandemic: A Retrospective Cohort Study

INTRODUCTION

Air medical transport during the coronavirus disease 2019 pandemic was essential for transferring critically ill patients. This study aimed to comparatively analyze air-transported patients with and without coronavirus disease 2019 according to their clinical condition and complications that occurred during the flight.

METHODS

This was a retrospective cohort study that analyzed the digital records of adult patients transported by fixed-wing aircraft from the interior of the state of Amazonas to the state capital Manaus, Brazil, from June 2019 to May 2021. Pearson's chi-squared, Fisher exact, and Wilcoxon-Mann-Whitney tests were applied (significance level of P < .05).

RESULTS

The sample consisted of 741 patients (60.59% men, median age 54 years). The incidence of complications during the flight was 7.28%, with emphasis on dyspnea, psychomotor agitation, and pain. There was a significant difference between patients with (n = 466) and without coronavirus disease 2019 (n = 275) regarding the variables age (P < .001), comorbidities (P < .001), body mass index (P < .001), impact (P < .001) and priority (P = .002) of the transfer, physiological severity (P < .001), use of vasoactive drugs when boarding the aircraft (P = .033), and occurrence of respiratory complications during air medical transport (P = .003).

DISCUSSION

Patients with coronavirus disease 2019 were older, had more comorbidities and were severely ill, and had higher body mass index, frequency of vasoactive drug use, and respiratory complications. Although there are minimal differences among these patients, the role that interhospital transfer plays in reducing burden on local, less well-equipped hospitals is a primary role of medical transport, particularly during pandemics.

Prehospital Ultrasound Use to Guide Resuscitative Thoracotomy in Blunt Traumatic Cardiac Arrest

Traumatic cardiac arrest is frequently encountered in the air medical transport environment, and resuscitative thoracotomy is a procedure that is sometimes performed in an attempt to salvage these critically injured patients. Focused assessment with sonography for trauma (FAST) is a point-of-care ultrasound protocol commonly used in trauma patients to detect the presence of free fluid in the intraperitoneal and pericardial spaces. The authors present a case of an adult female victim of a motor vehicle collision whose prehospital FAST scan revealed significant hemoperitoneum without hemopericardium. When she developed cardiac arrest, these ultrasound findings aided in the decision to perform resuscitative thoracotomy and helped guide the sequence of maneuvers with prioritization given to cross-clamping the aorta. This case highlights the utility of prehospital ultrasound in yielding timely, actionable diagnostic information that can inform the performance of a high-acuity low-occurrence procedure in the air medical transport environment.