Oxygen for MI

[Rendar5]

Got a quick question for you heart guys. Is there any decent evidence either way for giving O2 to MI patients or ACS patients? I know it's not definitive treatment, but it seems like standard of care. It just never really made any sense to me why it would help in someone with perfectly fine SpO2. If cardiac tissue isn't receiving adequate blood supply, raising partial pressure of oxygen doesn't seem like it would do anything.

 

[grendelsdragon]

Got a quick question for you heart guys. Is there any decent evidence either way for giving O2 to MI patients or ACS patients? I know it's not definitive treatment, but it seems like standard of care. It just never really made any sense to me why it would help in someone with perfectly fine SpO2. If cardiac tissue isn't receiving adequate blood supply, raising partial pressure of oxygen doesn't seem like it would do anything.

AHA/ACC guidelines for STEMI suggests that supplemental oxygen is a Class I intervention (Level of evience B) if O2 Sats are <90% and Class IIa intervention for use across the board (Level of evidence C). Observational data shows that patients can be modestly hypoxemic even in an uncomplicated MI, and oxygen has experimentally been shown to limit ischemic injury. Much of ACS management has been refined into pathways to simplify treatment and increase compliance of caregivers. In many cases, if the intervention causes no harm and can potentially do good, they are implemented without too much condition.

 

[bossenton]

Again, need for O2 is clinical bed side judgment. Not needed to improve outcomes if sats maintained, good adjunct for anxiety alleviation.
thanks