November 20, 2019
What is pulmonary hypertension? | Respiratory system diseases | NCLEX-RN | Khan Academy

What is pulmonary hypertension? | Respiratory system diseases | NCLEX-RN | Khan Academy


– [Voiceover] Hypertension means exactly the same thing as high blood pressure. This can be a disease on its own. So when people have high blood pressure, we can say they’re hypertensive or they have hypertension. Now, pulmonary is a word, every time you see this, it’s going to be referring to our lungs. So pulmonary hypertension is literally high blood pressure in the lungs. And you might be thinking,
what do you mean? How can there be high blood pressure in what seems like a sac of
air, right, or in our lungs? But in fact, the lungs
are a very important part of the circulatory system for our blood. Let’s look at really quickly what the heart and lungs do. And I drew this blue person here to show you that blood
coming from the body returning to the heart
is blue or low in oxygen. We use blue to represent that because the muscles have extracted the oxygen out of the blood and used it. So we have our heart here with its four chambers. Now, this is going to be the right side. This is going to be the left. In medicine, left and
right is usually flipped, as the person is facing you, so their right is your left. All right, we have right
atrium, receiving chamber, right ventricle, from
here it goes to the lungs. Left atrium, left ventricle. So the blood comes in here first, blue blood from the body goes
into the right ventricle. And from here it goes to the lungs. Let’s draw some lungs really quickly, windpipes, into smaller airways, and our lungs are these
two big structures, like that. And indeed, it looks like two sacs of air. But the truth is with each of these as they start branching
off with all the airways, the blood vessel, blood
supply actually follows the same pattern, the
same path as the airway, so that we get a very good system that interfaces between
the blood and the air. And the purpose of that is
to get oxygen into the blood. Now, I’m using red here to draw this just because blood we
usually think of as red. But remember that it comes
in as deoxygenated blood and leaves as oxygenated. Just to blow that up for you, this is our alveolus or the smallest unit in the lungs and air sac. The blood supply would run just along it. Blue first without oxygen. And as the oxygen enters
into the blood, it turns red, so the blood supply
leaving the lungs is red. All right, so we got oxygenated it. And we need to return to the heart. Now we’re red blood with
oxygen to the left atrium, goes into the left ventricle, and from there it goes out the aorta to the body and now we have a red person. So roughly this is the path
of the blood in our body. So if we think of this as almost a circuit where there are many stops along the way that liquid has to flow through, let me see if I can make this make sense. So if we have our body here that is giving blood to the heart, this is our heart, we have our lungs, and returning to the rest of the body, so we need one more
unit here into our body. Of course, this is connected. It’s in a loop. So the pulmonary hypertension, we have the lungs are clamped down. Hypertension means there’s
a lot of resistance in this area of the circuit. So basically, it’s hard
for liquid to flow through. And as you can imagine what would happen is that would have a lot of back up into these parts of the circuit. Because it’s hard to get blood through, then we back up. And then going forward, we have not enough because the blood is trapped here. It’s bottlenecked.

21 thoughts on “What is pulmonary hypertension? | Respiratory system diseases | NCLEX-RN | Khan Academy

  1. i think using red and blue lines to represent the oxygenated blood and deoxygenated blood for the circulatory cycle is not appropriate and may mislead the audience, instead , use the red and blue lines to represent the artery and vein is more suitable. Thank You.

  2. ok, I watched the entire video and what I got out from it was the heart circulatory system, which I already knew. I want to know more in depth about pulmonary hypertension, not cardiovascular system.

  3. Almost all conventional treatment solutions do not assure to wipe out hypertension, yet prevent it from recurrence.

  4. You'll be able to dramatically lower blood pressure even if you've been taking drugs for years.

  5. I understand how bad it feels suffering hypertension. I had spent big bucks on treatment solutions with no long term result.

  6. This video wasn't the same high quality as what Khan Academy usually produces. There was only a 15 description of what HTN is and the rest was basic A&P…

  7. I'm the spouse of a person starting diagnosis and treatment of pulmonary HTN. We like this video a lot because we needed the basic biology explained. It's perfect for this purpose.

  8. “nο†οvα yuku shocking” (G00GLE it) is among the list of prime ways of fixing blood pressure. It is written in easy to understand language and it is simple to follow. Individuals with high blood pressure could have this book that I suggest for coping with this issue. My blood returned to the standard 120/80 after using the advices on the program.

  9. My pal asked my lookup “Zοtοsο yuku”, the blood pressure level solution on G00GLE. His blood pressure level of 158/120 was dangerous. Through the help of this program and eating clean, it had been able to lessen quickly back to normal. It has gradually reduced and 2 weeks later with healthier eating his blood pressure is 128/84.

  10. Posts a video about pulmonary hypertension. Then rambles about the circulation in the body and draws the wrong type of heart. Then states a very vague explanation of PH in the last 20 seconds of the video. Please just remove this video. It is not up to Khan Academy's standards. Thanks.

  11. If everyone in the comments already kind of knew these things about the lungs, then you shouldn't have to watch a video about pulmonary hypertension really… xD

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