So it's not pumping hard enough or well enough to provide adequate function for that person.

Died October 12.

Some of you may remember that.

The heart is taking a quick breather to refill.

It's a really thin layer, not a very thick layer.

And anytime I mention the word vein, I just want to make sure you think of blood going towards the heart.

They die of HlV, they die of hepatitis C, they die of infections of their heart valves, they die of infections of their brains, of their spines, of their hearts, of their bloodstream.

Those are not the arteries that people are talking about getting clogged, when people talk about heart disease or heart attacks.

In the new cycle you have a bit of blood that's going from the right atrium to the right ventricle.

So what you're looking at is basically kind of a mechanistic way of thinking about the heart.

The function of the heart is to pump blood.

And then you've got the capillaries, you've got some blood kind of from both places the pulmonary circulation and the blood from the systemic circulation again mixing.

tearing their internal organs, their liver, their lungs, their heart bringing tissue, bone, blood, brain matter, and that's called a blowback.

Another tissue or organ that makes people kind of wonder, is the heart.

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

Lets divide it out with a large line.

And if the bullet pierced his heart, it would have stopped pumping instantly.

What's the matter with him?

Now that heart.

My heart!

My heart.

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

For example, insufficient angiogenesis not enough blood vessels

You might think 'How's that possible? How can blood be in two places at one time?'

This is the human heart.

So that's how the blood gets back to the heart.

So the fact that this part starting from the heart and going back to the heart is one circuit.

Your partner, he's had a heart attack.

Looks like he died of natural causes. Maybe a heart attack.

It's her heart.

Feel my heart.

(HEART MONITOR BEEPING)

(HEART MONITOR FLATLINING)

Heart attack.

I thought my heart was gonna explode.

The doctor monitored the patient's heartbeat and blood pressure.

We send the severed bodies and the fragile hearts back to Xerxes' feet.

I could hear crackly sounds on both sides that told me that she was in congestive heart failure.

Reptiles were now equipped to colonize the uplands. 300 MYA

And they go up to the cath lab and boom, boom, boom get rid of the clot.

And it came up in the right atrium from a giant vessel up top called the superior vena cava. And this is a vein of course because it's bringing blood towards the heart.

Her heart certainly failed to beat.

It would kind of deliver all the blood to the various organs, then the organs would use up the oxygene, so let me show it kind of now going back to blue.

Do you worry about what is going to kill you?

He might need surgery