Which oxygen therapy recommendation is correct for ACS patients?

Answer

The correct recommendation for Acute Coronary Syndrome (ACS) patients is to administer oxygen only for patients with O2 saturation less than 90% or those experiencing respiratory distress. Routine administration of supplemental oxygen to non-hypoxic ACS patients is not recommended because hyperoxia can cause coronary vasoconstriction, increase oxidative stress, and potentially worsen myocardial injury.