Can one of you kind of refresh our audience as to what that means in regards to the patient's heart and why then a balloon pump is indicated for that?

So ejection fraction simply means how much of the blood is coming out of the heart or is being ejected from the heart with every beat.

I think most people, well, most non-medical people think that when the heart beats, 100% of the blood comes out of it and it gets pumped forward.

And that's not the case at all.

For a normal heart, you know, 65, 70% or so of the blood will get ejected.

That is, gets pumped to the body.

And a severe heart failure, I mean, which is what this patient has.

For context, a regular systolic blood pressure is around 120 millimeters of mercury.

And Dr. Wilmes, do you want to explain an ER mentality when you have that 88% on room air, who's somebody who's short of tachycardic, who's 33 years old, what your typical workup is?

Young guy, hypoxic, you know, kind of start developing a differential for that.

I was kind of joking about PE, but you hear hypoxemia, young person, tachycardic.

I mean, that's a PE, you know, that's a PE brewing until proving otherwise.

But this young guy has a, you know, autoimmune disorder.

So you have to kind of worry about things associated with that.

Certainly still infection is going to be high on the list, right? So does he have a pneumonia? Does he have a viral pneumonitis? Those sorts of things.

So tell us what you're worried about and what you're always going to be watching for, especially with the 33-year-old gentleman with pneumonia, labs really getting funky, a complete whiteout of his right lung.