Afterload (Cardiac Muscle Mechanics) in 4 minutes

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Cardiac Muscle Mechanics
AFTERLOAD
  1. Dr. Umar
  2. USMLE
  3. avicenna
  4. school
  5. medicine
  6. health
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Afterload and preload is simple.
Afterload is a resistance or pressure. Preload is a amount of blood. Imagine you have a tank in your home. When you open the tap water fill up in the tank after closing the tap, amount of water present in the tank is preload. Now tank has to empty the water in order to supply it to somewhere. So there will be a lot of external resistance water will try to push back to the tank but tank is strong enough to send the water out - it is your afterload. So preload is amount of blood present in the heart in your right and left ventricles at the end of relaxation.and then contraction period starts, so left or right ventricles have to overcome the pressure coming from system circulation or pulmonary circulation- this is your afterload

blackyrocky
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Thank you!!! This is just what I was looking for! Thank you for making the blood pressure connection!

javamomx
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Thanks doc!!! helped me with understanding a concept from my Human Physiology course (last semester of undergrad)

llnn
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That's so good video. I understood it to the core. Thanks doctor! 🙏🙏

drwizardd
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Thank you for this. You've explained it brilliantly

itsnoorr