Abstract | BACKGROUND: METHODS: In this registry-based randomized clinical trial, we used nationwide Swedish registries for patient enrollment and data collection. Patients with suspected myocardial infarction and an oxygen saturation of 90% or higher were randomly assigned to receive either supplemental oxygen (6 liters per minute for 6 to 12 hours, delivered through an open face mask) or ambient air. RESULTS: A total of 6629 patients were enrolled. The median duration of oxygen therapy was 11.6 hours, and the median oxygen saturation at the end of the treatment period was 99% among patients assigned to oxygen and 97% among patients assigned to ambient air. Hypoxemia developed in 62 patients (1.9%) in the oxygen group, as compared with 254 patients (7.7%) in the ambient-air group. The median of the highest troponin level during hospitalization was 946.5 ng per liter in the oxygen group and 983.0 ng per liter in the ambient-air group. The primary end point of death from any cause within 1 year after randomization occurred in 5.0% of patients (166 of 3311) assigned to oxygen and in 5.1% of patients (168 of 3318) assigned to ambient air (hazard ratio, 0.97; 95% confidence interval [CI], 0.79 to 1.21; P=0.80). Rehospitalization with myocardial infarction within 1 year occurred in 126 patients (3.8%) assigned to oxygen and in 111 patients (3.3%) assigned to ambient air (hazard ratio, 1.13; 95% CI, 0.88 to 1.46; P=0.33). The results were consistent across all predefined subgroups. CONCLUSIONS: Routine use of supplemental oxygen in patients with suspected myocardial infarction who did not have hypoxemia was not found to reduce 1-year all-cause mortality. (Funded by the Swedish Heart-Lung Foundation and others; DETO2X-AMI ClinicalTrials.gov number, NCT01787110 .).
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Authors | Robin Hofmann, Stefan K James, Tomas Jernberg, Bertil Lindahl, David Erlinge, Nils Witt, Gabriel Arefalk, Mats Frick, Joakim Alfredsson, Lennart Nilsson, Annica Ravn-Fischer, Elmir Omerovic, Thomas Kellerth, David Sparv, Ulf Ekelund, Rickard Linder, Mattias Ekström, Jörg Lauermann, Urban Haaga, John Pernow, Ollie Östlund, Johan Herlitz, Leif Svensson, DETO2X–SWEDEHEART Investigators |
Journal | The New England journal of medicine
(N Engl J Med)
Vol. 377
Issue 13
Pg. 1240-1249
(09 28 2017)
ISSN: 1533-4406 [Electronic] United States |
PMID | 28844200
(Publication Type: Journal Article, Multicenter Study, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
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Topics |
- Aged
- Female
- Follow-Up Studies
- Heart Diseases
(diagnosis)
- Hospitalization
- Humans
- Kaplan-Meier Estimate
- Male
- Middle Aged
- Myocardial Infarction
(diagnosis, mortality, therapy)
- Oxygen Inhalation Therapy
(adverse effects)
- Proportional Hazards Models
- Registries
- Sweden
- Treatment Failure
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