Refereed journal article or data article (A1)
Inhaled Xenon Attenuates Myocardial Damage in Comatose Survivors of Out-of-Hospital Cardiac Arrest The Xe-Hypotheca Trial
List of Authors: Olli Arola, Antti Saraste, Ruut Laitio, Juhani Airaksinen, Marja Hynninen, Minna Bäcklund, Emmi Ylikoski, Johanna Wennervirta, Mikko Pietilä, Risto O. Roine, Veli-Pekka Harjola, Jussi Niiranen, Kirsi Korpi, Marjut Varpula, Harry Scheinin, Mervyn Maze, Tero Vahlberg, Timo Laitio
Publisher: ELSEVIER SCIENCE INC
Publication year: 2017
Journal: Journal of the American College of Cardiology
Journal name in source: JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY
Journal acronym: J AM COLL CARDIOL
Volume number: 70
Issue number: 21
Start page: 2652
End page: 2660
Number of pages: 9
ISSN: 0735-1097
eISSN: 1558-3597
DOI: http://dx.doi.org/10.1016/j.jacc.2017.09.1088
BACKGROUND The authors previously reported that inhaled xenon combined with hypothermia attenuates brain white matter injury in comatose survivors of out-of-hospital cardiac arrest (OHCA).OBJECTIVES A pre-defined secondary objective was to assess the effect of inhaled xenon on myocardial ischemic damage in the same study population.METHODS A total of 110 comatose patients who had experienced OHCA from a cardiac cause were randomized to receive either inhaled xenon (40% end-tidal concentration) combined with hypothermia (33 degrees C) for 24 h (n = 55; xenon group) or hypothermia treatment alone (n = 55; control group). Troponin-T levels were measured at hospital admission, and at 24 h, 48 h, and 72 h post-cardiac arrest. All available cases were analyzed for troponin-T release.RESULTS Troponin-T measurements were available from 54 xenon patients and 54 control patients. The baseline characteristics did not differ significantly between the groups. After adjustments for age, sex, study site, primary coronary percutaneous intervention (PCI), and norepinephrine dose, the mean +/- SD post-arrival incremental change of the ln-transformed troponin-T at 72 h was 0.79 +/- 1.54 in the xenon group and 1.56 +/- 1.38 in the control group (adjusted mean difference -0.66; 95% confidence interval: -1.16 to -0.16; p = 0.01). The effect of xenon on the change in the troponin-T values did not differ in patients with or without PCI or in those with a diagnosis of ST-segment elevation myocardial infarction (group by PCI or ST-segment elevation myocardial infarction interaction effect; p = 0.86 and p = 0.71, respectively).CONCLUSIONS Among comatose survivors of OHCA, in comparison with hypothermia alone, inhaled xenon combined with hypothermia suggested a less severe myocardial injury as demonstrated by the significantly reduced release of troponin-T. (C) 2017 by the American College of Cardiology Foundation.
