Stenosis, ischemia and heart failure | Miscellaneous | Heatlh & Medicine | Khan Academy

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  • Опубликовано: 28 авг 2024

Комментарии • 57

  • @amesalicious03
    @amesalicious03 10 лет назад +13

    I wouldnt have made it through all my pathophysiology classes for nursing without your videos!!!

    • @arturogoleman5221
      @arturogoleman5221 4 года назад

      Appreciate video content! Sorry for chiming in, I would appreciate your opinion. Have you ever tried - Ganadelyn Astounding Guide (Sure I saw it on Google)? It is a great one off product for getting rid of heart disease without the headache. Ive heard some awesome things about it and my friend at very last got astronomical results with it.

  • @thevarrior
    @thevarrior 13 лет назад

    Amazing work Sal. Quick bit for some of the commenters...
    1. Heart Failure is by definition the inability of the heart to maintain an adequate Cardiac Output (CO). This is the amount of blood pumped out per minute. If it's too low your body systems cannot oxygenate adequately of course.
    2. CAD/CHD is NOT the same thing as Heart Failure. These are conditions which can LEAD to heart failure (in other words, your heart gets damaged, the pump becomes weak, and THEN you end up with heart failure).

  • @Moomai95
    @Moomai95 10 лет назад +7

    thank you for explaining this , you explain it better than my professor :)

  • @Zain.Basi1
    @Zain.Basi1 9 лет назад +3

    Your videos are priceless..Thank U very much ..you're really helping

  • @khanacademy
    @khanacademy  13 лет назад +1

    @vpletap No, heart failure can be caused by CAD/CHD/Heart Disease.

  • @bethannawhite2275
    @bethannawhite2275 3 года назад

    Hello, this is quite older but I just found it. Too much to write but I have been looking for an explanation of my heart issues, no one has explained it better and I am very grateful for the information. Blessings to you!

  • @breezygyang
    @breezygyang 13 лет назад

    A lot of your video is clear and accurate. In simplifying the explanation of ischemia, you misled your audience. Damaged heart muscle with sufficient injury can lead to ht failure, but it would be at the end of a much longer process. The example of jogging with a coronary artery stenosis would lead to "angina" NOT heart failure. Ht failure occurs when the heart fails to pump sufficient to the body's needs. It would be rare to develop heart failure while jogging, but common to suffer angina.

  • @sarahjones7034
    @sarahjones7034 10 лет назад +1

    Very helpful explanation - thanks.

  • @reubenkinara
    @reubenkinara 12 лет назад +1

    Thanks. I'm doing A level biology and I need to make sure I don't confuse my terms.

  • @elkozako12
    @elkozako12 10 лет назад +3

    thank you. You are the teacher of the century

  • @umk3mafioso
    @umk3mafioso 13 лет назад

    Intersting and important information, which should have been mentioned:
    Blood doesn't only suply oxygen, but also blood supplies glusose and takes away lactic acid from the cell. When lactic acid accumulates very much, it causes the pain.

  • @jonathanochoaaguirre
    @jonathanochoaaguirre 12 лет назад

    You have such a way to explain things so much simpler. Thanks alot it was a great video! You should do more on stuff like this. Now i understand it 100% thanks again!

  • @jongelb9603
    @jongelb9603 3 года назад

    Interestingly you defined everything but Heart Failure, which is one of the three terms in your video title. HF can be defined in terms of reduced stroke volume, cardiac output (Starling curves). Great job with stenosis and ischemia though.

  • @esskay7484
    @esskay7484 7 лет назад

    Thankyou for the lecture

  • @joshuarawr
    @joshuarawr 13 лет назад +2

    Yay for clarity..

  • @justintneel
    @justintneel 12 лет назад +1

    Heart failure can cause angina but that does not necessarily mean it is heart failure. Angina can be caused by cardio, pulmonary, or even problems like acid reflux because angina is just pain, discomfort, or tightness in the chest. Only about 30% of chest pain is even related to the heart.

    • @MustangGaming429
      @MustangGaming429 6 лет назад

      People can also mix up heart failure with cardiac arrest, because they sound the same. Cardiac arrest is your heart stopping, whereas heart failure essentially just means that the heart is failing to do what it should be doing.

  • @nefertiti7367
    @nefertiti7367 3 года назад

    Thank you 🙏🏻

  • @TheMetalKS
    @TheMetalKS 12 лет назад

    Thanks, should've have done more research myself.

  • @mikep4216
    @mikep4216 11 лет назад

    Awesome explanation

  • @thealmassi1
    @thealmassi1 11 лет назад +1

    So how come Ischemic Heart Disease is the most common cause of death in the world if it supposedly causes heart failure so rarely?

  • @eternallight351
    @eternallight351 13 лет назад

    thanks!

  • @23vanota
    @23vanota 11 лет назад

    Sharp explanation

  • @NatriumN
    @NatriumN 4 года назад

    super! thank you a lot

  • @reubenkinara
    @reubenkinara 12 лет назад

    Pulmonary vein brings oxygenated blood from the lungs back to the heart. The coronary arteries "feed" the heart with blood so that it can respire. They actually are the first arteries leading away from the aorta, so the blood they give to the heart is really oxygenated.

  • @a.m.a5122
    @a.m.a5122 7 лет назад

    thank you man...thank you!

  • @Pwise003
    @Pwise003 12 лет назад

    The pulmonary vein takes the newly oxygenated blood from the lungs and brings it to the Left Ventricle of the Heart. The Coronary Artery are arteries that break off of the Aorta and feed the Heart oxygenated blood so it can keep doing its job.

  • @641rider
    @641rider 13 лет назад

    THANKS ALOT SIR

  • @Opeth15cool
    @Opeth15cool 13 лет назад

    Dang, khan has been busy!
    Good video as always

  • @reubenkinara
    @reubenkinara 12 лет назад

    Atherosclerosis is the build up of fatty deposits within the arterial walls. LDL cholesterol is deposited and is ingested by macrophages, resulting in a fatty streak. Stenosis is the result the condition of narrowing of the lumen.

  • @OscarJuvera
    @OscarJuvera 9 лет назад +1

    Whats the name of the black program his using? 😓

  • @SEThatered
    @SEThatered 13 лет назад

    Hehe we have a very normal stenosis of our trachea.
    Without knowing the real meaning of it i would think it is a bad condition. :)
    Thank you.

  • @dr.harshvardhanpuranik
    @dr.harshvardhanpuranik 11 лет назад

    Is ischemia defined as " restriction in blood supply" as per your explanation in video
    or it is strictly defined as "a restriction of blood supply in tissue"
    for theoretical or exact use
    [without doubting the common sense]

  • @TheMetalKS
    @TheMetalKS 12 лет назад

    Does anyone know what exactly is the difference between pulmonary vein and coronary artery? Thanks :D

  • @silviapedemonte3788
    @silviapedemonte3788 4 года назад

    K riesgo uno corre con septial ishemia?????

  • @KenyanPuppyDog
    @KenyanPuppyDog 12 лет назад

    So are Atherosclerosis and Stenosis the same thing?

  • @TheSalcuga
    @TheSalcuga 13 лет назад

    @khanacademy do you teach Electrical Engineering Fundamentals?

  • @HotPepperLala
    @HotPepperLala 13 лет назад

    Sal's wife is now teaching Sal to do biology videos!

  • @guerillachan20
    @guerillachan20 13 лет назад +1

    How does it feel to know tat probably every college student watches ur video.

  • @machekecn6798
    @machekecn6798 9 лет назад

    thank you man, your video really helps.

  • @420hassam
    @420hassam 13 лет назад

    SAL PLXX also do videos on HIV

  • @Hubie59
    @Hubie59 11 лет назад

    Plaque accumulates under the endothelial layer, which the diagram violated.

  • @silviapedemonte3788
    @silviapedemonte3788 4 года назад

    K es una septial ishemia

  • @4UStevePerry
    @4UStevePerry 10 лет назад

    Narrowing or constriction of an artery

  • @reubenkinara
    @reubenkinara 12 лет назад

    Don't mention it

  • @0lympianz
    @0lympianz 9 лет назад

    Reply to Perry Wiseman
    Pulmonary vein returns blood from the lungs to the left atrium mate. From Left atrium, it does to left ventricle via the Mitral valve.
    On a side story, good presentation. I liked.

  • @cindyduncan6524
    @cindyduncan6524 11 лет назад

    he forgot diastolic heart failure caused by high blood pressure

  • @reubenkinara
    @reubenkinara 12 лет назад

    So heart failure is Angina?

    • @desilithuanian7548
      @desilithuanian7548 4 года назад

      reubenkinara heart failure causes angina pectoris(pain in chest)

  • @breezygyang
    @breezygyang 13 лет назад

    Stenosis, not stenois.