Preload and Afterload Nursing | Stroke Volume, Cardiac Output Explained
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- čas přidán 22. 07. 2024
- Preload vs. afterload nursing review of stroke volume and cardiac output.
What is cardiac preload and afterload?
Cardiac preload is the amount the ventricle stretch at the end of diastole. Diastole is the filling or relaxation phase of the cardiac cycle. Preload is the amount of blood volume that fills that ventricle when the filling phase is over. Therefore, it is also called the end-diastolic volume (EDV).
Cardiac afterload is the pressure the ventricles must work against to open the semilunar valves so blood can leave the ventricle and enter either the lungs or systemic circulation. Afterload is influenced by vascular resistance, which is either pulmonary (which affects the right ventricle) or systemic vascular resistance (which affects the left ventricle).
Preload and afterload play an important role in affecting cardiac output because they influence stroke volume. Cardiac output is the amount of blood pumped by the heart per minute, and it's calculated by the heart rate times the stroke volume.
Stroke volume is the amount of blood pumped by a ventricle per beat. The three factors that influence stroke volume are contractility, preload, and afterload.
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Thank you so much for this video and the free quiz! Haven't seen anyone do that before and that is always what I am most worried about is how it will be asked. So thank you for doing that.
@@Tigress_Lilly😂❤😅
I remember in 2016 watching you for my LPN course then again in 2019 for RN school. Here i am again almost 3 years as an ICU nurse studying for my CCRN. Thank for being a part of my nursing journey i couldn't thank you enough ❤
You're very welcome! THANK YOU for this kind comment. It means so much to me that the videos have helped you in your nursing journey. I'm very honored to be part of it. Congrats to you on all your amazing accomplishments 💜
I watched your videos during nursing school. & in preparation for NCLEX, I used your videos &quizzes to supplement UWorld. I passed 1st try with the least questions possible. I've now worked for 3yrs as an RN in surgical and in oncology. I am now transitioning to the Cardiac ICU and I am here watching your videos again! Your succinct teaching/explanation is exemplary! Thank you! & Please don't stop!
You have a gift to teach/educate - thank you for sharing your gift. Love the videos.
When i was preparing for my nclex 3 years ago im watching your videos and helped me through my exam. Now that im taking my CCRN im still watching your videos. Thank you! Hope you do more videos for ccrn.
In my last semester of nursing school and never understood preload or afterload until I watched this video! Thank you so much 🙏🏻
I was struggling with preload and afterload and this made it so much easier, thank you for all that you do!!
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These videos are a God send in order to pass critical care. So thankful I found these and can rewind and pause as many times as I need to really understand the material. The quizzes are awesome too in letting me know what I need to go over again and in making sure I fully understand and can apply the material in the same way I need to on an exam. Thank you so much for all of this!
I start my nursing program next semester and I’m watching your videos for fun 😍 I think I’m ready to tackle nursing school, feeling confident 😂😂👍
How's the program going?
Ms. Sarah, I would just love you to say thank you for posting all of these videos. I get so frustrated sometimes because my professor gives us loads of PowerPoints and never really goes into detail it’s missing pieces that’s causing me to not understand the concept! Every time I don’t understand something, I immediately go to your videos and you go through ABSOLUTELY EVERYTHING that my professor goes over and MORE! You repeat some things in your video and it helps significantly. Thank you so much for making school for me so much less difficult. I love love love and appreciate you so much for helping me and for others when you don’t have too. I hope you are well mentally and physically and will be sending lots of love and blessings! THANK YOU from a future NP ❤️
Am currently taking advanced pathophysiology online . You’re the best teacher
Love all ur videos, especially the drip rate calculations. Thanks so much Sara.
Wow! First year med student and no of my professors could explain it this well. Thank you!
Sarah, thank you so much for taking the time to make such informative and high-quality videos. I just started my med/surg 2 semester and my professor spent 20 minutes trying to explain preload and afterload to us only to make it 10x more confusing for everyone. Thanks to you, it all makes so much more sense! :)
Thank you so much ma'am.
Lots of love & respect from India ❤
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Thank you so much!! I struggle with some of these concepts that "can't be seen"
Cordially appreciates your work ,you have made me love my profession ,the way u explain is simply amazing stay blessed
This was perfect and so well explained and very clear. I was having trouble wrapping my head around this concept but you have cleared it up significantly for me. Thankyou so much!
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So many of us owe you a big thanks for helping us through nursing school and passing our NCLEX. Here I am coming back to your videos in preparation for the cardiac ICU. You are a God-send!
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And I love how you have quizzes at the end of videos and the rationales are put if you missed a question. You do an excellent job in explaining..90% on this quiz🙌🏾💃🏾
Best teacher :)
It’s sometimes easy to mix up drug/physiological effects on pre or afterload. Nice video!
I usual do not make comments on educational videos based off of appearance but good grief she is an amazing instructor and gorgeous. Thanks for the very informative and easy to understand video.
I really appreciate you!!! I passed Nclex!!! With your classes, I could be allowed to understand and memorize easily !! Thank you so much from bottom of my heart♡♡♡♡♡♡
congrats!!!
You are literally one of the best educators. Thank you so much.
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I deeply understand about the preload and after load thanks to your video. Thank you very much :)
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I love the balloon. It's a perfect visual.
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This was an awesome video that finally helped me grasped what Preload and Afterload is. Thanks for taking the time to make this because it really helped!
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I have an exam for Medsurg coming up and we only get lecture powerpoint slides and an in class lecture, but you've explained it in a much shorter time and it's easier to understand. Thank you!
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This is probably the first time that preload and afterload made sense to me. Thank you!
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I was looking for a video on your channel about this yesterday and woke up to a notification for it😅
Perfect timing.
Wishing you could be my instructor 😂 thank you SO MUCH!!
Watching all your videos to passively learn while I do pre req for nursing! Hope I make a good one one day
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All of your video classes have been amazing; Studying for patient care technician NHA certification exam and the nursing aspect of the topics I needed to learn very detailed which allowed me to better understand topics and terms better. Thank you.
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Am a kenyan student nurse 3rd year mount kenya university Thanks your videos simply means alot to me dont stop keep going God bless you..
Thank you Sarah. You cleared my concept on preload and afterload❤
Thank you for great work, just finished my NCLEX, waiting for results. But I have to give you props your lectures are amazing. I am sure I passed.will update
THANK YOU THANK YOU THANK YOU FOR MAKING THIS!!! SUPER HELPFUL!!!!
At last I have captured the concept after watching a lot of videos..😊😊 thank you madam your explanation is amazing 🤩
This was incredibly helpful! Could you make a future video going over all the heart failure medications and their specific impact on afterload and preload? I keep finding conflicting info and it's super confusing. Thanks so much 🙏
You're videos are always so helpful! Thank you for posting!!
Best explanation of preload and afterload ever !! awesome
had a hard time understand that. Thank you!
Thanks, very helpful! The quiz helped test my knowledge as well 😊
Thank you for helping me understand this , so much easier..
Thank you! This was really helpful and well explained :)
This was by far the best video on this topic
Thank you so much for posting this video and you have a gift of explaining topics that we nursing students think are so hard BUT YOU EXPLAIN IN GREAT DETAIL BUT ALSO SO IT'S ABLE TO BE UNDERSTOOD...you need to come to my school and teach this topic my instructor don't know what she doing...THANK YOU NURSE SARA🫂
Awesome explanation! Thank you! You are getting me through nursing school
Hai in my last semester of nursing school and never understand preloaded or ofter load until I wanted this is tank you so much
thank you so much. You explain it so well!
you are absolutely incredible. love watching your videos. they're always so helpful. thank you!!
So helpful! Taking the CCRN and this is a great review.
loved the way you put everything together and made it really easy
The balloon pushed it right over the top, now I get it! Thank you!
what a beautiful explanation! thank you Sarah!!! (:
Thank you are such a great teacher to me. I learn more from you. Keep teaching mam. Appreciated !!
Thank You so much ! I'm in my 3rd bachelor year of medicine. Always had trouble finding motiation to study due to a CZcams addiction. Your videos are going to help me fight that addiction and improve my grades immensely. I'll be bingewatching you from now on! Thank you so much, livesaver!
Very good missy ! Some of the doctors videos don’t touch you at all. Great job , now I understand
Thank you so much, this really helped!
Hi Sara, your videos are amazing! I recently passed the NCLEX and your videos were really helpful while I was studying! Keep doing what you're doing!👌🏻
congrats! may I ask what you specialize (if you do) in now?
Thank u thank u ...cant thank u enough especially for the ABG videos...tic tac method helped me alot...thank u
This is the best video I've found so far!!! Thank you so so so so so so much! ❤️
This video is awesome and I subbed. I love the use of the balloon to demonstrate the concept. One area I'm really interested in is cardiac nursing, because it does not change like other specialties such as cancer. I worked oncology as a CNA for 2 years and I just felt like I could never keep up with all the changes. I also like all the technology used in cardiac and it's neat to see what they come out with next. You can use your phone now to monitor your heart-so cool.
The book we are using for my anatomy class is not that great at explaining why this is taking place, but this seriously helped explain it all thank you!!!
I really wish you held courses in person. You're a great teacher!