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{ "pk": 42051, "title": "Emergency Department Management of Acute Heatstroke: A Retrospective Analysis from Phoenix, Arizona", "subtitle": null, "abstract": "<p><strong>Introduction:</strong> The global incidence and severity of severe heat illness is on the rise. The increasing number of summer heatwaves in Phoenix, Arizona, gave us a distinctive opportunity to better understand the impact on the clinical presentation and management of acute heatstroke. Our primary objective in this study was to describe the prehospital and emergency department (ED) clinical presentation, treatment, and outcomes of patients with acute heatstroke at a single hospital system during the summers of 2021 and 2022 in Phoenix.</p>\n<p><strong>Methods: </strong>This was a descriptive, retrospective observational study of heatstroke-associated adult ED presentations occurring from June 1 – August 31, 2021 and June 1 – August 31, 2022, to a single hospital system in Maricopa County.</p>\n<p><strong>Results: </strong>We identified 60 ED heatstroke encounters. The median environmental daily maximum (Tmax) and minimum (Tmin) were 106.0° Fahrenheit (interquartile range [IQR]) 102.0 - 109.0°F) and 84.0°F (IQR 79.0 - 88.0°F), respectively. The patients were commonly male (42, 70.0%, 95% CI 56.8 - 81.2%), White (26, 43.3%, 95% CI 30.6 - 56.8%), middle-aged (mean 52.7 years, 95% CI 48.4 - 56.9), Medicaid-insured (37, 61.7%, 95% CI 48.2 - 73.9%), and presenting via emergency medical services (60, 100%). Patients were commonly of high acuity (median Emergency Severity Index 1, IQR 1.0 - 2.0), and intubated (45, 75.0%, 95% CI 62.1-85.3%). Forty-seven (78.3%, 95% CI 65.8 - 87.9%) patients were found unresponsive outside with associated substance use (methamphetamines 22, 46.8%, 95% CI 32.1 - 61.9%; and fentanyl 14, 29.8%, 95% CI 17.3 - 44.9%). The average patient Tmax at ED presentation was 41.9°C (IQR 41.1 - 42.2). Forty-one patients (68.3%, 95% CI 55.0 - 79.7%) survived to hospital discharge or transfer, of whom 32 (82.1%, 95% CI 66.5 - 92.5%) were neurologically intact.</p>\n<p><strong>Conclusion: </strong>During the summers of 2021 and 2022, a significant number of heatstroke presentations were treated in a single healthcare system in Maricopa County, Arizona. A substantial number were successfully treated with cold water immersion and discharged neurologically intact. In this urban population, extreme weather exposure and associated substance use appeared to play significant roles.</p>", "language": "eng", "license": { "name": "Creative Commons Attribution 4.0", "short_name": "CC BY 4.0", "text": "Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.\r\n\r\nNo additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.", "url": "https://creativecommons.org/licenses/by/4.0" }, "keywords": [ { "word": "Emergency Medicine" }, { "word": "Hot Temperature" }, { "word": "heatstroke" }, { "word": "global warming" }, { "word": "Substance-Related Disorders" } ], "section": "Climate Change", "is_remote": true, "remote_url": "https://escholarship.org/uc/item/8dd4w47w", "frozenauthors": [ { "first_name": "Jeffrey", "middle_name": "", "last_name": "Stowell", "name_suffix": "", "institution": "Creighton University School of Medicine, Phoenix, Department of Emergency Medicine, Phoenix, Arizona; University of Arizona College of Medicine, Phoenix, Department of Emergency Medicine, Phoenix, Arizona; Valleywise Health, Department of Emergency Medicine, Phoenix, Arizona", "department": "" }, { "first_name": "Paul", "middle_name": "", "last_name": "Pugsley", "name_suffix": "", "institution": "Creighton University School of Medicine, Phoenix, Department of Emergency Medicine, Phoenix, Arizona; University of Arizona College of Medicine, Phoenix, Department of Emergency Medicine, Phoenix, Arizona; Valleywise Health, Department of Emergency Medicine, Phoenix, Arizona", "department": "" }, { "first_name": "Megan", "middle_name": "", "last_name": "McElhinny", "name_suffix": "", "institution": "Creighton University School of Medicine, Phoenix, Department of Emergency Medicine, Phoenix, Arizona; University of Arizona College of Medicine, Phoenix, Department of Emergency Medicine, Phoenix, Arizona; Valleywise Health, Department of Emergency Medicine, Phoenix, Arizona", "department": "" }, { "first_name": "Geoffrey", "middle_name": "", "last_name": "Comp", "name_suffix": "", "institution": "Creighton University School of Medicine, Phoenix, Department of Emergency Medicine, Phoenix, Arizona; University of Arizona College of Medicine, Phoenix, Department of Emergency Medicine, Phoenix, Arizona; Valleywise Health, Department of Emergency Medicine, Phoenix, Arizona", "department": "" }, { "first_name": "Jacquelyn", "middle_name": "", "last_name": "Pearlmutter", "name_suffix": "", "institution": "Creighton University School of Medicine, Phoenix, Department of Emergency Medicine, Phoenix, Arizona; Valleywise Health, Department of Emergency Medicine, Phoenix, Arizona", "department": "" }, { "first_name": "Murtaza", "middle_name": "", "last_name": "Akhter", "name_suffix": "", "institution": "Creighton University School of Medicine, Phoenix, Department of Emergency Medicine, Phoenix, Arizona; University of Arizona College of Medicine, Phoenix, Department of Emergency Medicine, Phoenix, Arizona; Valleywise Health, Department of Emergency Medicine, Phoenix, Arizona; Penn State Health Milton S. Hershey Medical Center, Department of Emergency Medicine, Hershey, Pennsylvania; HCA Healthcare, Department of Emergency Medicine, Miami, Florida", "department": "" }, { "first_name": "David", "middle_name": "", "last_name": "Sklar", "name_suffix": "", "institution": "Creighton University School of Medicine, Phoenix, Department of Emergency Medicine, Phoenix, Arizona; University of Arizona College of Medicine, Phoenix, Department of Emergency Medicine, Phoenix, Arizona; Valleywise Health, Department of Emergency Medicine, Phoenix, Arizona; Arizona State University, School of Medicine and Advanced Medical Engineering, Tempe, Arizona", "department": "" } ], "date_submitted": "2025-01-25T08:31:49.639000-08:00", "date_accepted": "2025-06-08T20:48:31.489000-07:00", "date_published": "2025-09-25T14:35:00-07:00", "render_galley": null, "galleys": [ { "label": "PDF", "type": "pdf", "path": "https://journalpub.escholarship.org/westjem/article/42051/galley/40011/download/" } ] }