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.

[@LoraGarcia1]

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.

[@maryelizabethgaither6079]

Your videos are lifesavers. THANK YOU!

[@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.

[@drproctor1234]

These videos are amazing. Thank you for sharing them.

[@chukwumelaagha9442]

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

[@marktaylor8611]

You are really good explaining! Thanks for the video!

[@hananalmutairi3415]

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

[@daisygonzalez6209]

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

[@lezaedaicarg917]

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

[@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!

[@ladonnawebster9971]

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

[@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

[@iwantitallyesterday7126]

Another excellent video. Thanks for sharing!

[@zeronaught]

Fantastic summary of the conduction system!!!

[@karentrible268]

Thank you for sharing your time and teaching talent!

[@susannaheinze]

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

[@suzan9528]

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

[@shashikantgupta5749]

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

[@johnemanuel241]

thanks for your competent explanation, how helpful!!!

[@lusiatawase405]

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

[@ufuomanefesharonjenkins4887]

So explanatory..... thank you so much

[@dawnallen123]

Great explanation!! Thanks so much :)

[@Melissa_Hoffman]

Very helpful! Thank you!

[@sushantakundu4115]

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

[@lubnakhan4397]

thank you for the great effort

[@marynana6368]

Well explained, thank you so much 😊

[@becks1120]

very very helpful! in very plain language!

[@dominic77999]

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

[@anandhonmanepatil]

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

[@mariyanabranzburg8320]

Great video!!!

[@sunily9681]

Tq you so much for your teaching and also very helpful

[@nevenmahmoud8283]

Thank you so much, you’re so smart.

[@snehanath9852]

Thanks to you.. Your video is helping me alot

[@bellboy951]

Awesome video 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.

[@tumpalpasaribu1869]

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

[@suyealvarado]

awesome!! thank you.

[@acsadayal3497]

Very helpful. Thank you

[@Cupcakebabe84]

Do you have these for down load or printing?

[@anuparashar8462]

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

[@chorizapeke]

excellent!!! thank you!!

[@briankush419]

Well explained.thank you

[@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?

[@farazshahid7304]

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

[@joemwenyakalambo2583]

nice video love the heart

[@dheersusania2846]

Thank you very much !!!

[@JananiParanthaman]

Loved it!

[@user-jq8vt6rh5w]

Best video ever thank you:-D

[@theat3show]

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

[@mariyanabranzburg8320]

I understood it all just because of u ! Thank u very much!

[@christone1406]

thanks a lot I've understand it better now.

[@clarecourtney8185]

Enjoyed that, thank you, 😊

[@jointheconversation2782]

Thank you very much, now I understand better for that

[@mahaavtarbabajineebkarolibaba]

excellent n superb video

[@aaushichauhan1414]

thank you very much your pronunciation is very nice

[@amanrataul7961]

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

[@jesminamondal5376]

Well explained❤

[@satka2mau487]

love your videos...im studying for a diploma re naturopathic nutrition and 1st year is biomedicine and learning body systems...overwhelming but these videos really help..thank you!

[@Nursing626]

Nyc teaching experience

[@MeaHeaR]

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

[@anishshaw9631]

Nice Designs and Handwriting. Beautiful voice

[@oputamary7635]

You are saving life 💖💖💖

[@joe-lz2lt]

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

[@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?

[@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.

[@mariyanabranzburg8320]

By the way-u have a beautiful voice ;)

[@muhammadzubairqureshi2085]

Best explained thnQ mam 💝💗

[@marissafernandez9973]

Thank you I appreciate you very much

[@roseleenday7300]

Brilliant she knows her stuff x

[@akeelshah7904]

life saver thanks

[@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.

[@topalaluiza9647]

Thank you so much 🙏🤗🌹

[@tamarawilson9642]

You are a blessing

[@dr-iqranasimabbas1375]

Vry vry intrsting lec excelnt😃😃

[@nahoga]

Excellent

[@dipakraaj9684]

one word im grateful

[@susannaheinze]

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

[@reeman3579]

thank you so much, you are amazing

[@susannaheinze]

Reem An Thank you for the very encouraging comment!

[@mariemidy8879]

Thanks I was lost for a minute.

[@chochee07]

AMAZINGGGGGG!!!!!

[@vestafarhan7580]

Does AV Valve open in disstole phase?
Thanks 🙏

[@Roohullah_]

Amazing dear 😘

[@mindfullearner344]

Thank you.

[@DrSADAM-tu5el]

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

[@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.

[@stephendanielmumbere4892]

so helpful, a video

[@rhithikaramesh]

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

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

Watching in lockdown ❤️💞💕💞💕

[@iworkweekly]

How does the SA node generate the initial impulse?

[@Drfascinator]

same like the nerve impulse

[@W46546-f]

Thanks.

[@drsudesraj9383]

awesome

[@eritrean3975]

Thank you

[@susannaheinze]

you are very welcome!

[@vengpionilla1876]

perfect explanation..

[@diaugh]

Thank you~ ^_^

[@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!

[@mathematicaltricks8129]

nice

[@cay0703]

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

[@veanne]

same lol

[@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

[@nikitasharma7321]

Thñku mam 😊