The Cardiac Cycle

[@claytonrose88]

You just explained basically 30 pages of reading in my A and P book in a 13 minute video. You are the man.

[@alverarobinson9276]

He really is the man lol. I'm so beyond happy I bumped into his videos.

[@georgyorgy2]

My teacher spent like half an hour trying to explain this and failed miserably, but you sir, were successful in less than half the time. You're the man!!

[@bigdaddylee8019]

this professor is a heavenly sent for all medical students.

[@deanie54]

THANK YOU I WAS LITERALLY CRYING ABOUT MY PHYSIOLOGY CLASS BUT NOW IM A LITTLE MORE HOPEFUL BRO

[@CariBaez]

i thought i was the only one that cried :(

[@jessienguyen1193]

same!

[@Bilbus7]

Dang I hope you're not my doctor or nurse

[@darklarrie535]

are u a doctor now

[@angelapockat6696]

This is one of the best videos on the cardiovascular system out there. Well done

[@canpeanionut]

I can't say anything more than: "Respect." . I do respect this man for what he is doing and I think we all should.

[@regardsrhi]

Was searching for lots of videos to explain the cardiac cycle, this is the best one so far! So detailed and you accent is lush :)

[@sageforcast]

Made an account just to say thank you. That made my life easier.

[@Splinter4077]

My heart has gone through so many rhythms since watching this video. Makes you think a little!

[@ladynottingham89]

You are a great teacher. It is truly an art to be able to teach to others!

[@whisperingsage]

And some teachers don't care if you understand, they just want to dazzle their students with their intelligence. Thankfully, there are fewer of those these days. AT least I am lucky.

[@Debster675]

I've learned more from you in just one video than I have from a human physiology class in a four year university. Thank you soo much! :D

[@misskittani]

You have helped me a lot during my physiology course. A real treasure, I just love you

[@zorro5210]

totally awesome and your voice is so smooth and easy to listen too, no jumping around , concise all the way through. WOW!!! is right , so glad I saw this and your other videos. Give yourself a you tube nobel prize.

[@melissabarrientos9785]

I have studied medicine for 8 years and this is by far the best and easiest way to explain such an important subject! thanks to u Im confident with this subject for my step 1 :)

[@jessegandy7039]

This is the best A&P teacher on youtube.

[@InteractiveBiology]

@ToRnAdO0504563168 Thanks for the feedback. Glad you are enjoying it! Stay tuned for many more!

[@allimeo1]

You are a lifesaver!!! I plan on using all our videos to help me with my physiology class. (My professor assumes we already know all of this)

[@bams6920]

You are going heaven because of this video. I know you heard this hundreds of times but this is the best explanation of the graph so far. THANK YOU SO MUCH

[@slurpee3113]

Thank you SO much! I might actually pass my anatomy and physiology test tomorrow now!

[@InteractiveBiology]

Woohooo! All the best!

[@fatimahff123]

+Interactive Biology i paaaaass it becauz of this video oh god thaaank u teacher !!!!!

[@naimamalik8410]

Interactive Biology

[@hamedhosseini4938]

Passing is shit. HD or death.

[@jessienguyen1193]

Im P1 student, this part of lecture, my professor made it so complicated and confusing. I was struggling w it. I went through couple videos on youtube, but yours are the best. I love the tempo, clear explanation, visual aid you show. Thank you so much!

[@robertp5615]

Great video! thanks for the explanation. One thing though, the 4th sound has to do with the active filling of the ventricle (due to atrial contraction), not the filling of the atrium. Just like the 3rd is the passive filling of the ventricle, the 4th is the active. Thank you again for the great video!

[@hesc2139]

No other video or college professor has been able to make this any more clear for me...and you did it in less than 14 minutes! I wish I would have found your videos earlier! This video makes the whole process so easy to understand. Your videos make an excellent reference. Thank you!

[@01rai01]

I can confidently say that the reason I ace the pressure-volume curve question on my exam was because of this video. I watched the vid about 4 times and had like Leslie's voice in my head while doing the question. Thanks for all you videos.

[@InteractiveBiology]

@MaficSun You're welcome! Stay tuned. We have more Biology videos to be uploaded very soon! :)

[@turbotysen]

Helped me understand WAY better. My teacher brushed right through this part of the lesson so fast, it was hard for me to retain all of the useful information that I needed. Also just looking it over in the book trying to understand it by yourself is kind of challenging. Much thanks and appreciation!

[@assemubigaliyeva5872]

Out of all the videos I've watched on youtube to get this topic you eased this whole process for me. A HUGE THANKS, DUDE)

[@linzahashir7099]

I have no words...just THANK YOU SIR!!!

[@burninhelenprd]

Thank you SO MUCH for these videos, I have a particularly inconsistent and confusing teacher for physiology who is unable to organize the material in a way that makes sense and is cohesive. I wish I could have paid you the tuition instead as these videos are how I am really learning. I wish all teachers could teach the way you do. you are amazing! Truly, from the bottom of my heart, thank you!

[@kasnimalan9628]

I’m way too lazy to listen to someone explain BUT this guy is a legend. He broke it down, explained well. Watch it.

[@courtneywestbrook67]

Hey, Leslie. I'm a senior in college and am in Animal Physiology this semester and it's killing me! Thank you so much for taking the time to post all these videos. They are so helpful!! I just wish I had discovered these earlier and I'd probably have an A and not a B! :)

[@786slizza]

im watching all your muscle and heart videos one day before my finals and i must say iv learnt more in these past two hours than i have in the past 4months!!!!! THANK YOU

[@Missprak]

Excellent teaching of the Cardiac cycle, may God continue to bless you with your great generosity

[@catherineava7937]

You are awesome! I wanted this for my physiology essay.BIG hug for you. You explained it million times better than the physiology textbook.

[@nickcolejackson6884]

I want to thank you sooooo much for making this process as easy as possible. You have helped me with several topics and I really appreciate it. I needed help with this section because it is so many sections and it has a lot of details. I have a good understanding now of what is going on after many times of watching. THANK YOU SO MUCH FOR YOUR HELP!!!

[@PAStudent]

That was the best video I have watched on Wiggers! Thank you!

[@gigilo0910]

I think your speed is great. It allows me time to digest the information. Great job!!

[@LoolJohn]

You are amazing! I am much less overwhelmed now than I was 14 minutes ago. Thanks for breaking this down so well.

[@PoorAmerican]

Got an exam on this in a few days and your videos will get me that A. Thank you so much for making these. You are incredible.

[@marygracerafisura7475]

I LIKE THAT YOU ARE COMMUNICATING IN A SIMPLER WAY FOR A PERSON LIKE ME WHO HAS A MIND THAT CAN ONLY RETAIN WHEN YOU EXPLAIN IT LIKE A CHILD. LOL.JK.. LOVE THE WAY UR EXPLANNATION. KEEP BEING A GOOD TEACHER....DON'T GIVE UP ON UR STUDENTS EVENTHOUGH IT FEELS AN INTERNAL LIFE OF TEACHING...DON'T LOSE THAT PASSION

[@NYESTRELLA]

I have no words to explaine to you, how mucho you have helped me and continue to do so. THANK YOU VERY MUCH FOR SUCH A GOOD HEP

[@michaelgernatt5621]

This is hands down the best video I have seen for explaining this process. Thank you so much!

[@katedrake1171]

This is the best description I have found so far, you did a very good job explaining this! Thank you so much.

[@samirpatel5786]

Many have stated it, but I just want to reiterate, you sir are a great teacher. Took an absolutely brutal topic and made it cake. Thank you so much for that!!!

[@tererachie]

It was definitely intimidating at the start but it's amazing how it all makes sense at the end of the video. Thank you very much

[@oliviaalladaye6592]

It is really the type of processus that needs to be broken down ... and you do it very well, slowly and clearly. Thanks so much for your help !!

[@BabyCas99]

Thank you so much! I could actually cry tears of joy! I might have a chance of passing my Physiology and Pharmacology exam with 50% failure rate now! THANK YOU!

[@HEADSH0TSCOTT]

I needed a quick refresher and this really helped. Best video I've seen on the subject.

[@donnagarrison7847]

I love love love this teacher and entire description! Thank you for explaining it all at a glance!

[@InteractiveBiology]

All questions are answered in the Interactive Biology forums from now on. Go to the website in the description and then visit the forum. This is to make it as efficient as possible as we have multiple people over there to help answer questions. All the best

[@pauline836]

Glad to see this vid. Light teaching yet fraught of info and detailed process helps me go through my self studying for my practical exam.

[@MaficSun]

Remember walking into class late with all this stuff written on the board. i was so lost... not anymore. thanks a bunch.

[@tehyonglip9203]

it was so intimidating when i first saw it, but now it looks much better, free subscription for you

[@MMM2345DDD]

I just discovered your channel. Great presentation with easy to absorb descriptions and instructional materials. I shall explore your other videos. Thank You!

[@thegarbageman21]

Yes you are correct. The ventricle AV valves are open and at ventricular low pressure (after relaxation) so the blood will pour in from the atria. Remember you have all that blood coming into the atria from the Vena Cava which makes atria have more pressure than vent. In young people ventricles actually get over 80% of the blood before the atria contract. When you get older however the ventricles get stiffer so that atrial pumping mechanism becomes more important to squeeze that blood in.

[@jyothsnab.k3928]

Very beautifully explained. Thank you for sharing.

[@InteractiveBiology]

@CKB06 You are very much welcome! Stay tuned for many more :)

[@InteractiveBiology]

@TimmysMummy Ouch, sorry to hear that. Being nervous definitely impacts the way you do on an exam. But over time, it can get better, especially if you study EXTRA hard so that you are extra prepared.

[@rexexdesign]

Best video on cardiac cycle, hands down!

[@giavonnivirella9032]

I've found my new bestie!!!! Hello A. Thank you Sam. So clear, so concise, so simple.

[@ellierebecca1994]

I finally understand it now! Best cardiac cycle video ever!

[@SirLadyChrome]

I usually don't like videos longer than a few minutes, but this is such a good video! It definitely beat the lecture (and was way shorter) :)

[@ahmedmansour9958]

its really a beneficial channels ever .... my appreciation for you .... i really was confused but after watching this video I really understood well

[@Susunsusi]

Bio final in two days...u r a life saver!!can't thank you enough!:) :)

[@nabilbarsoom7935]

thank u indeed , an easy and simple way of teaching , but wishing a richer scientific subject .

[@kimberly2216]

This explains so much! Exactly what’s covered on my physiology exam thank you!

[@ErikaJLopez]

I love your videos Leslie Samuels, you have a wonderful voice and way of speaking that keeps me intrigued!!!!

[@InteractiveBiology]

@combymanje123 You're welcome! PLease stay tuned because we have more Biology videos coming very soon!

[@InteractiveBiology]

@xty070 You're very welcome! Stay tuned. New Biology videos will be uploaded soon!

[@InteractiveBiology]

@Neopluto We'll see what we can do. :) Thanks for watching though! There are more videos you might want to watch from our Biology website. More will be uploaded so, please stay tuned!

[@namkien9842]

You're such an amazing teacher. Your lecture is truly clear and understandable. But I hope you would add in the subtitle or description to help foreign learners could understand better :D. Thanks a lot!!!

[@ManSirMr]

Great job on explaining the cardiac cycle. I was worried about learning the wiggers diagram but now with your help I feel I understand it better.

[@jenniferchen12345]

Hey, from what I know, after the atria filling (isovolumetric relaxation), the pressure rises in atria causing the AV valves to open and blood starts filling the ventricles. THEN the atria depolarizes and contracts finish filling the ventricle (sort of like topping it off)

[@sostoked07]

Thank you for this!!! I know you've just recently let go of this channel (so bittersweet but I wish you the best!), but I'm still sending you my thanks. Med student here, and I'm quite intimidated by cardiology. Thanks to your amazing video (and really friendly narration), I feel much more reassured :) May more good things come your way!! :)

[@dorsamavedatnia3417]

This video saved my life. Thank you sooooooo much

[@mariyanabranzburg8320]

intimidating less but helped me understand better, thank u so much!!!! :)

[@InteractiveBiology]

Glad to help :)

[@justicemunyoro]

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[@mamadousowe4978]

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[@ChrisD00100]

Thanks for the video :) 5* I've got an exam on the 9th of January 2013 and though a video could help! Will be visiting your website and may tell my friends about it! Thanks again

[@ToRnAdO0504563168]

you really made it fun not like our prof. in collage, keep up the nice work

[@ahmedbass1257]

Thanks man am an mbbs uni student and am studying the cvs module now this diagram was getting on my nerves i swear but u man u deserve a medal for that video physiology of the cvs is in my pocket now :D thanks brother ❤️

[@T2star]

After perusing many cardiac cycle videos on here, I can say this is the most succinct and digestible one. Some videos on here have big errors so be careful. This video is what you need!

[@InteractiveBiology]

Yayyyy, Glad to hear that. Did you see my recent video on the cardiac cycle? I decided to revisit the topic here - kzbin.info/www/bejne/gZ6xeaSnp6ukfZo

[@megans7673]

Thank you for making this video! Made the diagram a lot more approachable when broken down into more simple parts. Much appreciated!

[@mariakiser]

makes it crystal clear...you should be teaching at my college!

[@anti_fascist]

This is amazing! Thanks a lot! You're the best teacher ever.

[@jjangjangz]

thank you for the video!! I understood so much more from this than a two hour lesson from my teacher ;w;

[@Nanomachines5on]

Thanks for walking through this. Saved me a lot of study time.

[@magicalair]

I seriously love your videos! Thank you for doing this! You are such a great help to students and anyone who just wants to learn everywhere!

[@TheDrT321]

Thanks so much. I go to one of the best schools in UK but I understood better with this vid.

[@InteractiveBiology]

@viju345 Glad you're finding value in it. Visit our site for more fun Biology videos!

[@madisonjones9137]

What took my professor 2 hours to explain, you answered in 13 minutes. THANK YOU KIND SIR!!!! Saved in dental school

[@InteractiveBiology]

Glad to help 👍

[@InteractiveBiology]

@jadsal92 You're welcome! Please stay tuned for more Biology videos to be uploaded very soon!

[@InteractiveBiology]

@NYESTRELLA Glad to know it's helping. All the best!

[@kelseyandearth]

Thank you soooo much!!!! This helped clear up some confusion before my exam!

[@teodorasecara4464]

Thank you for such a great explanation, you taught me better than my biology teacher !

[@annetteasbury7415]

Thank you so very much for this video sir! We had this same diagram presented to us in our NP advanced pathophysiology/physiology course and the instructor just blew through it as if it was something we had been previously exposed to. The only thing that was clear was that it supposedly represented the cardiac cycle. Thanks to your video I can now go back to the diagram and actually UNDERSTAND what's going on. Thank you so very much!

[@Devovanfleet]

This was extremely helpful. I've watched it several times. THANK YOU!!!!!

[@christopherleggett]

Thank you for this awesome video on the cardiac cycle!! So much better than trying to get all this from a textbook, and the zooming/video overlays are really useful!

[@InevitableMonth29]

Sir, you are AMAZING!!! Thank you for making this very easy and fun to understand!!

[@rameenaamir7163]

U are the definition of ''blessing'' I'm crying

[@hannahburgol1563]

I've been having a hard time understanding the cardiac cycle and this helped a lot. Thank you!

[@patrickwilkinson6276]

Thank you for such informative, and easy to understand videos. You really do a wonderful job. Keep it up.

[@rmcdaniel423]

Great video! Question: Aortic valve opens when contracting vent. pressure exceeds the resting diastolic pressure in the aorta (80mmHg). Pressure waves cross there. At the end of vent. syst., relaxing vent. pressure drops below chock-full-O-blood aortic pressure and the valve shuts as aortic blood presses against the cusps. Why are the pressure waves different there? Why is aortic pressure 100mmHg and vent. pressure 60mmHg? Why doesn't the aortic valve close at 80mmHg?

[@tatisilva5029]

WOOOOOWWW you helped me A LOT! Thank you very very much! I'm a brazilian biomedic student and I had some difficulties regarding the cardiac cycle but now I don't. :D Excellent video! Congrats! My best to you and I'm so sorry if I wrote something wrong in English.