Up here you have the pulmonary valve.

So just like before where we went from the right atrium to the right vertricle, now we're going from the left atrium to the left ventricle.

You can take a guess as to which ones I'm referring to. Atrioventricular valves are the two valves between the atria and the ventricles.

When the valves snap shut, for example the tricuspid and the mitral valve snap shut, well, that makes a noise.

You'll hear S1 when the tricuspid and the mitral valve snap shut. So far so good.

These valves shut down like that.

So let's say this is a clump of white blood cells and lipid materials and all the rest

No surprise, just as before, if that's S1, this is S2.

Just to orientate us this is the tricuspid (T) and this is our mitral (M).

So when you have dub, you have noise coming from the pulmonic and the aortic valve snapping shut.

But you also know that if that is what's making the noise, you can kind of guess, and it's a smart guess that at the same time the pulmonic and the aortic valve just opened.

As the blood is now in the ventricles, you can see that the tricuspid and the mitral valve are open.

So when this guy is jogging, because he has restricted blood supply because the heart is experiencing ischemia downstream from this stenosis, that's why there's heart failure so not able to deliver

I make a new robot copy as in my sample code in class.

If the ventricles are squeezing, there's a good chance the blood is gonna shoot up in any direction it can go.

Now, a word that you might hear in a medical context is stenosis , and the word just refers to the narrowing, usually of a blood vessel.

This is one of the arteries that feed the heart, one of the main arteries, and you can see the narrowing here.

This is a representative patient who at the time was 73 totally needed to have a bypass, decided to do this instead.

Monks.

The monk?

You.

Lennox, I'm with the kid.

Got a little, uh... spasm in your trapezius.

You all right?

Gedevan, you tell me.

Paddy boy.

Now you've probably the heard the term 'Coronary Heart Disease' or maybe just 'Heart Disease'... these three things are all the SAME thing.

Hey you!

Monastety?

Come here, boy.

Hey, boy.

Cloche, dunce hat, death cap, coif, snood, barboosh, pugree, yarmulke, cockle hat, porkpie, tam o'shanter, billycock, bicorne, tricorne, bandeau, bongrace, fantail, night cap, Garibaldi, fez...

(Laughter)

boy!

What are you, a monk?

He knows too much.

The kid's in a boathouse under the pier.

Shrink

Shrink...

They say it's angina.

There's no room.

The lunches!

Get back you kids!

You're a fool, boy.

Speak to your little fuckboy.