What Stroke Volume is and How to Calculate it
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- Опубликовано: 1 авг 2024
- www.interactive-biology.com - Making Biology Fun
In this video, I talk about what stroke Volume is - the difference between end-diastolic volume and end-systolic volume. SV = EDV-ESV. Enjoy!
00:00 Intro
01:20 What is Stroke Volume?
01:55 Blood flow in the heart
02:30 Definition of Systole
02:40 Definition of Diastole
02:48 Definition of End Diastole Volume (EDV)
03:14 Definition of End Systolic Volume (ESV)
03:46 Graph showing EDV and ESV points
05:23 Calculating Stroke Volume (SV = EDV-ESV) .
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I've been searching the web and combing over my books for the best possible explanation to SV... I came across your video and now everything makes sense. Thank you!
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@letty3434 With regular exercise, one of the things that happens is that the heart gets more efficient at pumping blood. In other words, our Cardiac output increases. One of the ways of doing that is by decreasing End Systolic Volume. I talk about that in episode 50. Check it out and it should help you understand it.
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my teacher never teach us how to calculate SV ,and i don't know these
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@letty3434 This is another one for Episode 53. Cardiac output stays the same. That's because stroke volume increases and heart rate decreases. CO = SV * HR. They balance each other out. Check episode 53 for a more detailed explanation.
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So just to make things clear, if EDV = 120mL and ESV = 50ml the stroke volume is 70mL. so 70mL of blood is pumped to the body when the ventricle (mainly referring to LV) contracts?
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Thanks Leslie Samuel from Amanda in Alabama in helping me to learn more about the heart and stroke volume, EDV, ESV for my anatomy and physiology class I’m currently taking!! This video is the best BECAUSE you use the graph and it has set this video apart from the others I’ve watched!! Thank you for the video and helping me to understand this process!
You are very much welcome, Amanda. That's so awesome. I'm glad you found the graph (and the video) helpful, and glad you understand the process now. Stay tuned for a bunch more content like this to help you to understand the human body.
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