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!

[@divyaduggal5950]

Extremely well explained and covered the most important aspects!

[@susannaheinze]

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

[@daisygonzalez6209]

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

[@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

[@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?

[@chukwumelaagha9442]

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

[@drproctor1234]

These videos are amazing. Thank you for sharing them.

[@lezaedaicarg917]

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

[@zeronaught]

Fantastic summary of the conduction system!!!

[@marktaylor8611]

You are really good explaining! Thanks for the video!

[@ladonnawebster9971]

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

[@iwantitallyesterday7126]

Another excellent video. Thanks for sharing!

[@hananalmutairi3415]

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

[@karentrible268]

Thank you for sharing your time and teaching talent!

[@susannaheinze]

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

[@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.

[@anandhonmanepatil]

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

[@shashikantgupta5749]

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

[@bunnywarren1]

Brilliant and so helpful. Thank you!

[@suzan9528]

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

[@sushantakundu4115]

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

[@johnemanuel241]

thanks for your competent explanation, how helpful!!!

[@anuparashar8462]

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

[@lusiatawase405]

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

[@snehanath9852]

Thanks to you.. Your video is helping me alot

[@sunily9681]

Tq you so much for your teaching and also very helpful

[@ufuomanefesharonjenkins4887]

So explanatory..... thank you so much

[@dominic77999]

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

[@marynana6368]

Well explained, thank you so much 😊

[@anishshaw9631]

Nice Designs and Handwriting. Beautiful voice

[@dawnallen123]

Great explanation!! Thanks so much :)

[@tumpalpasaribu1869]

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

[@mahaavtarbabajineebkarolibaba]

excellent n superb video

[@Nursing626]

Nyc teaching experience

[@Melissa_Hoffman]

Very helpful! Thank you!

[@becks1120]

very very helpful! in very plain language!

[@vestafarhan7580]

Does AV Valve open in disstole phase?
Thanks 🙏

[@briankush419]

Well explained.thank you

[@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!

[@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?

[@Cupcakebabe84]

Do you have these for down load or printing?

[@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?

[@MeaHeaR]

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

[@lubnakhan4397]

thank you for the great effort

[@farazshahid7304]

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

[@mariyanabranzburg8320]

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

[@jesminamondal5376]

Well explained❤

[@amanrataul7961]

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

[@bellboy951]

Awesome video Thank you!

[@mariyanabranzburg8320]

Great video!!!

[@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.

[@theat3show]

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

[@acsadayal3497]

Very helpful. Thank you

[@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

[@aaushichauhan1414]

thank you very much your pronunciation is very nice

[@dr-iqranasimabbas1375]

Vry vry intrsting lec excelnt😃😃

[@nevenmahmoud8283]

Thank you so much, you’re so smart.

[@jointheconversation2782]

Thank you very much, now I understand better for that

[@oputamary7635]

You are saving life 💖💖💖

[@clarecourtney8185]

Enjoyed that, thank you, 😊

[@christone1406]

thanks a lot I've understand it better now.

[@JananiParanthaman]

Loved it!

[@muhammadzubairqureshi2085]

Best explained thnQ mam 💝💗

[@joemwenyakalambo2583]

nice video love the heart

[@suyealvarado]

awesome!! thank you.

[@joe-lz2lt]

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

[@dheersusania2846]

Thank you very much !!!

[@user-jq8vt6rh5w]

Best video ever thank you:-D

[@Roohullah_]

Amazing dear 😘

[@marissafernandez9973]

Thank you I appreciate you very much

[@DrSADAM-tu5el]

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

[@topalaluiza9647]

Thank you so much 🙏🤗🌹

[@chorizapeke]

excellent!!! thank you!!

[@roseleenday7300]

Brilliant she knows her stuff x

[@iworkweekly]

How does the SA node generate the initial impulse?

[@Drfascinator]

same like the nerve impulse

[@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.

[@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 ;)

[@nahoga]

Excellent

[@mindfullearner344]

Thank you.

[@tamarawilson9642]

You are a blessing

[@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!

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

Watching in lockdown ❤️💞💕💞💕

[@reeman3579]

thank you so much, you are amazing

[@susannaheinze]

Reem An Thank you for the very encouraging comment!

[@akeelshah7904]

life saver thanks

[@rhithikaramesh]

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

[@vengpionilla1876]

perfect explanation..

[@stephendanielmumbere4892]

so helpful, a video

[@chochee07]

AMAZINGGGGGG!!!!!

[@Shiraz687]

Thanks.

[@drsudesraj9383]

awesome

[@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

[@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.

[@vestafarhan7580]

How many pulmonary artery attach to heart?
Pls answer me

[@ronni3723]

There's only one pulmonary TRUNK and is attached to the right ventricle of the heart. Then this pulmonary TRUNK splits into 2 pulmonary ARTERIES that 1 leads to the right lung and the other to the left lung. I hope this helps

[@cay0703]

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

[@veanne]

same lol

[@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!

[@diaugh]

Thank you~ ^_^

[@eritrean3975]

Thank you

[@susannaheinze]

you are very welcome!