When are oxygen saturation monitoring via pulse oximetry and supplemental oxygen indicated in acute myocardial infarction (MI, heart attack)?

Updated: May 07, 2019
  • Author: A Maziar Zafari, MD, PhD, FACC, FAHA; Chief Editor: Eric H Yang, MD  more...
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Continuous oxygen saturation monitoring by pulse oximetry is needed for all patients.

Supplemental oxygen by a mask or nasal cannula is indicated only for patients who are breathless, hypoxic (oxygen saturation <90% or PaO270</ref>), or who present with heart failure. The use of oxygen in patients with acute MI who don’t fall into one of the three above-mentioned categories remains uncertain, with some studies suggesting possible harm in such patients. [71]

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