Conduction System of the Heart

This video describes how the electrical signal passes through the heart and causes the coordinated contraction of heart muscle. Also included is an explanation of an electrocardiogram (ECG). Sympathetic and parasympathetic stimulation of the sinoatrial node and the effects of ACh and NE are also covered in this video. www.sciencewithsusanna.com has diagrams, notes, and practice questions.

[@ElleGeeFive4]

You have NO idea how much this has helped clear up a really bad lecture. Thank you.

[@yummyyummy-i7l]

I feel you!!

[@KerichXZ]

Thank you so much, Susanna! You have no idea how helpful this video was.

[@lianneylee4474]

Subscribed! I’ve been watching a bunch of these to prepare for the HESI I never realized how much of a visual learner I am until I started studying your video over the past 5 days

[@kikie9234]

how did you do?

[@divyaduggal5950]

Extremely well explained and covered the most important aspects!

[@susannaheinze]

Thank you for taking the time to leave this encouraging comment.

[@maryelizabethgaither6079]

Your videos are lifesavers. THANK YOU!

[@susannaheinze]

Here is the link to some of my notes:
drive.google.com/open?id=0B1opKPCEPfC_YjlrZ01qYkNLMlU
The conduction system notes are pages 168174-. Enjoy!

[@raepearlcanizares1152]

You are one of the most succinct and systematic teachers I have heard.

[@chukwumelaagha9442]

Very nicely explained! Great voice, great handwriting and great graphics!

[@drproctor1234]

These videos are amazing. Thank you for sharing them.

[@daisygonzalez6209]

u explained everything so clearly with no gaps. my millionth video

[@Mustamaggara]

Do you know why parasympathetic action potentials rarely reach my heart? Because what happens in vagus, stays in vagus. Have a good day

[@theviper3581]

Mustamaggara 😂😂😭

[@jennym732]

hahaha

[@isabella1207]

hahaha

[@lezaedaicarg917]

You are a savior! Thank you so much for this! And all your videos are so great!

[@marktaylor8611]

You are really good explaining! Thanks for the video!

[@tumpalpasaribu1869]

I give thanks anlot to Susanne,may God give you rewards.Amen

[@hananalmutairi3415]

Thank you so much 💗💗
What a great explanation ! It helped me a lot

[@zeronaught]

Fantastic summary of the conduction system!!!

[@becks1120]

very very helpful! in very plain language!

[@suzan9528]

amazing , very clear , and easy to understand , Thank you.

[@dominic77999]

thanks. Made it nice and clear for me. Radiography exams soon so some Cardiovascular revision was called for :)

[@anuparashar8462]

Thanku so much ma'am, I m a first year Mbbs student, and this is very
Helpful

[@Melissa_Hoffman]

Very helpful! Thank you!

[@shashikantgupta5749]

super video lecture , my all confusion are clear.
thank you so much

[@alkalinetyler]

This was a fantastic video!! Thanks for making it :) Still trying to wrap my head around the T wave wave.. Why is the "bump" positive, and not negative, if this is a repolarization event?

[@iwantitallyesterday7126]

Another excellent video. Thanks for sharing!

[@ChrisBurnsATL]

I think you find your calling. Nice work! Because of my recent (2016) AFIB diagnosis and two catheter ablations, I am studying the heart to have a better conversation with my EP[Electrophysiologists]. He's going to love my youtube knowledge or maybe not.

[@susannaheinze]

Good for you to study up on your condition. I definitely recommend that patients are very proactive with their physicians in discussing treatments and side effects. I hope you have a trusted friend or relative to bring with you to appointments. I think that really helps keep the conversation stay on track. Lastly, and perhaps you are already doing this, but I suggest you make a list of topics you want to discuss with your doctor during your appointments.

[@ChrisBurnsATL]

Good idea. Thank you.

[@farazshahid7304]

Bump Bump Bump Bump Bump Bump Bump Bump
Really Ver Usefull Ma'am Thank U So Much....

[@ufuomanefesharonjenkins4887]

So explanatory..... thank you so much

[@Cupcakebabe84]

Do you have these for down load or printing?

[@sunily9681]

Tq you so much for your teaching and also very helpful

[@dawnallen123]

Great explanation!! Thanks so much :)

[@anishshaw9631]

Nice Designs and Handwriting. Beautiful voice

[@AmandaM-t9e]

I want to say thank you if you still there make more videos plz 🙏

[@johnemanuel241]

thanks for your competent explanation, how helpful!!!

[@christone1406]

thanks a lot I've understand it better now.

[@mariemidy8879]

Thanks I was lost for a minute.

[@dipakraaj9684]

one word im grateful

[@susannaheinze]

Thank you for taking the time to leave this nice comment!

[@aaushichauhan1414]

thank you very much your pronunciation is very nice

[@abcd........139]

Watching in lockdown ❤️💞💕💞💕

[@briankush419]

Well explained.thank you

[@jointheconversation2782]

Thank you very much, now I understand better for that

[@Nursing626]

Nyc teaching experience

[@nevenmahmoud8283]

Thank you so much, you’re so smart.

[@Lakshmi235Lakshmi]

Thank you so much 🙏🤗🌹

[@marissafernandez9973]

Thank you I appreciate you very much

[@mindfullearner344]

Thank you.

[@jesminamondal5376]

Well explained❤

[@mahaavtarbabajineebkarolibaba]

excellent n superb video

[@tonym6920]

Hi, I've read that athletes have a slower resting heart rate, maybe 45-50bpm. So is possible to "train" the SA node to beat slower with regular exercise?

[@joemwenyakalambo2583]

nice video love the heart

[@mariyanabranzburg8320]

Great video!!!

[@muhammadzubairqureshi2085]

Best explained thnQ mam 💝💗

[@tamarawilson9642]

You are a blessing

[@chorizapeke]

excellent!!! thank you!!

[@dr-iqranasimabbas1375]

Vry vry intrsting lec excelnt😃😃

[@akeelshah7904]

life saver thanks

[@cay0703]

can someone simply explain what depolarize and repolarize means? i cannot wrap my head around it.

[@veanne]

same lol

[@iworkweekly]

How does the SA node generate the initial impulse?

[@Drfascinator]

same like the nerve impulse

[@vengpionilla1876]

perfect explanation..

[@stephendanielmumbere4892]

so helpful, a video

[@drsudesraj9383]

awesome

[@rhithikaramesh]

wooow !! so damn useful !!! thankyou so much ♥

[@nikitasharma7321]

Thñku mam 😊

[@fazalhakim1231]

amizing

[@susannaheinze]

Fazal Hakim thank you for your kind comment! what other videos would you be interested in having me make?

[@fazalhakim1231]

welcome welcom actualy i search alote of videos i m confuse by it to much when i watch it just remove my confusion thank you so mach...........for your kind response

[@mathematicaltricks8129]

nice

[@juliachambers725]

👏

[@JoelHernandez-rt1kt]

MY INTENSIONS ARE LOVEING MI CIELITO , MUAHHHHHHHHHHH 🌆😘😘😘😘😘😘!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@zabitkhan1336]

Mom can you made 1 lectures of microbiology.

[@apparaoapparao6082]

tq nice

[@zabitkhan1336]

Good mom

[@pamfakadel6460]

not idea to understand people

[@susannaheinze]

Pamfa Kadel Thank you for your comment! perhaps you could clarify, though. I'm not sure what you were referring to.

[@banshanbok]

Will u marry me?

[@ΓιαννηςΡοβιθης-μ8ρ]

Excellent!!!!!!!!

[@mariyanabranzburg8320]

By the way-u have a beautiful voice ;)

[@ladonnawebster9971]

Thank you soooo much, I understand know I was lost in class. Great video you explain everything great and slow. :)

[@joe-lz2lt]

thank you.....................esp.for that bit physiology part

[@shashimoghe3920]

Excellent, I have no words to appreciate your way of explaining the conduction system of heart I wish you success in your mission thanks 10,/12/2019

[@bunnywarren1]

Brilliant and so helpful. Thank you!

[@karentrible268]

Thank you for sharing your time and teaching talent!

[@susannaheinze]

Thank you for taking the time to leave such an encouraging comment!

[@marynana6368]

Well explained, thank you so much 😊

[@snehanath9852]

Thanks to you.. Your video is helping me alot

[@anandhonmanepatil]

Excellent Presentation.......Many Thanks ....Prof.Anand

[@lubnakhan4397]

thank you for the great effort

[@dheersusania2846]

Thank you very much !!!

[@suyealvarado]

awesome!! thank you.

[@clarecourtney8185]

Enjoyed that, thank you, 😊

[@diaugh]

Thank you~ ^_^

[@roseleenday7300]

Brilliant she knows her stuff x

[@oputamary7635]

You are saving life 💖💖💖

[@ronni3723]

@susannaheinze I am struggling with understanding this, I am aware that when the heart is re polarizing by K+ GOING INSIDE THE CELL which makes it become negative, but in your video you are saying that when K+ GOING OUT OF THE CELL becomes more negative after repolarizing that leads to hyperpolarization. So how is it that when K+ leaves it becomes more negative? Since we know that K+ coming inside the cell is what brings down the threshold to a more negative state. Please can you explain, I am so confused.

[@Wilkassenberg]

Very nice drawing and explanation, but WPW (Wolff-Parkinson-White) syndrome is not 'autorythmic atria', it is an antegradely (and often also retrogradely) conducting accessory pathway bypassing the normal AV-conduction via the AV-node, leading to preexitation of the ventricle its connected to. In other words, it's an extra connection between the atria and the ventricle next to the AV-node. This pathway is responsible for orthodromic circusmovement tachycardias and if conduction over this pathway is so called malignant (very fast) it can lead to ventricle fibrillation if the patient has atrial fibrillation. Other than that, a very informative presentation.

[@csssince2011]

Could we sum up the Ectopic Focus/Foci by saying "in college"? It seems like all of the causes are symptoms of being in college.

[@brycewilliams6593]

The 40-60 on Bundle of His is wrong. The AV node is 40-60 b/min and the bundle of his is 20-40 b/min

[@JananiParanthaman]

Loved it!

[@sushantakundu4115]

your video helps me to understand conduction system easily . thank you so much . sushanta.

[@theat3show]

I am going to have a test today thanks for the help

[@DrSADAM-tu5el]

In sympathetic nerve supply to SA node
I think it might be T1 to T4

[@MeaHeaR]

Wow this lady is not only very knowledgeable butt
also an Artisté too

[@lusiatawase405]

I've been looking for this. Thank you so much 😘

[@vestafarhan7580]

Does AV Valve open in disstole phase?
Thanks 🙏

[@rehemachan3270]

Hi and thank you for the lecture but can you please give me a copy of your notes. i like the way i am able to understand things that i cant get in my lecture class.

[@susannaheinze]

Sure! Here is the link to some of my notes:
drive.google.com/open?id=0B1opKPCEPfC_YjlrZ01qYkNLMlU
The conduction system notes are pages 168174-. Enjoy!

[@bellboy951]

Awesome video Thank you!