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Updated: Feb 1, 2026

Normothermic Cardiac Arrest and Cardiopulmonary Resuscitation: A Mouse Model of Ischemia-Reperfusion Injury
Published on: August 30, 2011
Survival After Cardiac Arrest With Instantaneous Rigorlike Stiffness: A Case Report
Yohei Okada1, Hiromichi Narumiya2, Naho Kobayashi3
1Department of Primary Care and Emergency Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan; Department of Preventive Services, School of Public Health, Kyoto University, Kyoto, Japan; Department of Emergency Medicine and Critical Care, Japanese Red Cross Society Kyoto Daini Hospital, Kyoto, Japan.
Abstract:
Instantaneous rigor is the immediate appearance of rigor mortis after cardiac arrest. To our knowledge, no previous reports exist on resuscitation of such patients. A young athlete suddenly collapsed with cardiac arrest during a marathon; his legs stiffened with instantaneous rigorlike stiffness. This stiffening provoked hyperkalemia, rhabdomyolysis, and multiple organ failure. We decided to amputate both legs, with venoarterial extracorporeal membrane oxygenation support. The patient recovered and was discharged without neurologic impairment. This rare case highlights the potentially significant effect of instantaneous rigor.
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