Action potential of cardiac muscle and SA Node - Usmle step 1 CVS Physiology
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Cardiovascular physiology - Action potential of cardiac muscle and SA Node , medical animations
Pacemaker cells (e.g., sinus node) of the conduction system of the heart autonomously and spontaneously generate an action potential that spreads throughout the myocardium.
The electrical excitation of the myocardium results in its contraction (electromechanical coupling).
The phase of relaxation prevents immediate re-excitation (refractory period).
Conducting system of the heart
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See structures of cardiac conduction system: collection of nodes and specialized myocytes that initiate and coordinate contraction of the heart muscle
Normal course of electrical conduction: sinus node (pacemaker) creates an action potential → signal spreads across atria and causes their contraction → signal reaches AV node and is slowed down → AV node conducts the signal to bundle of His down the interventricular septum to Purkinje fibers in myocardium → they spread the signal across the ventricles → the ventricles contract (electromechanical coupling)
#cvsphysiology #physiology #cardiovascularphysiology #usmlephysiology #usmle #usmlestep1 #medicalphysiology #actionpotentialofcardiacmuscle #actionpotentialofsanode #physiologyanimations #fmge #neetpg #snnode #avnode #cardiacmusclephysiology #cvsusmle #cvsphysiologyusmle
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@lawrenceezequiel7271
2 жыл бұрын
sorry to be off topic but does anybody know a way to get back into an Instagram account?? I stupidly forgot the account password. I would appreciate any tips you can give me.
@deepikarani4403
Жыл бұрын
Excellent sir excellent
the way u teach....& energy level u spread 💯 ✨
Nobody could explain this better than you Sir! Hats off Sir! Huge respect from Pakistan 🇵🇰 ❤️
@doctorbhanuprakash
3 жыл бұрын
Tysm
Its very better than western country videos... Thank u very much sir.. And please enlighten us in medical field
Best best best video ever in youtube n even in practical life this is the best video ever to understood the basic of conduction system of heart.
D best video av seen in a while , u r a great teacher , concept driven home easily .thank u so much sir
@doctorbhanuprakash
4 жыл бұрын
Thank u so much for ur appreciation
It clears my concept, thank you so much sir.
Excellent and simple presentation with high quality animation
very well explained in a very simplified manner, thank u sir
Wonderful explanation sir, thank you so much, I'm not from medical stream but I still understood very well
Very well explained in detail, thank you Sir
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@doctorbhanuprakash
2 жыл бұрын
Tysm
wonderfully explained Sir. Thnk u so much.
GREAT DR " Bhanu Prakash" 👌👌👌💖💖💖.
I m feeling so relaxed now seriously thank u sir I got the much needed concept with 3d 🙏🌼
@doctorbhanuprakash
5 жыл бұрын
Thanks for watching
Wonderful explanation sir!!!! Thank you so much
Dr. Bhanu, I like your video so much. It's very very clear than the others I have seen. Great thanks.
@doctorbhanuprakash
5 жыл бұрын
Thanks for watching
Amazing lecture sirji
Excellent.. Nobody could explain better than you.. Love from 🇧🇩
@doctorbhanuprakash
Жыл бұрын
Tysm
thanku soo much sir...its too helpful...i could never understand this..
Sir you are god gift for us
Awesome lecture
Good job!
real amaizing i appreciate your work
@doctorbhanuprakash
Жыл бұрын
Thank you so much
What you are doing is amazing sir
@doctorbhanuprakash
4 жыл бұрын
🤝🤝🤝
very nice...thnk u so much
Best teacher on youtube😍
@doctorbhanuprakash
2 жыл бұрын
Tysm
Well explained
So easy and understandable!
@doctorbhanuprakash
4 жыл бұрын
Glad it was helpful!
Thanks sir. Thanks a lot...
Sir your explaions are best just like dr najeedb
@doctorbhanuprakash
2 жыл бұрын
Tysm
Thank u so much. From Bangladesh
Awesome sir
Thank you so much sir 🙇♀️...
U rocked sir.... thank u very much sir... no words to describe ur work... its awesome!!
@doctorbhanuprakash
5 жыл бұрын
thank u so much
Very very rare concept not able to know by studying books or during other staff lectures,very great
@doctorbhanuprakash
3 жыл бұрын
Tysm
@kannankamal5446
3 жыл бұрын
Doc its an honour to get a reply from you,bless us with new concepts with your next video
Thank you so much it’s clear now in this topic keep rocking sir
@doctorbhanuprakash
5 жыл бұрын
Thank u so much for watching ...
Thanks 👏👏👏👏
u r the best!!!!!!!!🙏🙏
@doctorbhanuprakash
Жыл бұрын
tysm
Thank you Sir
Great value ♥️
@doctorbhanuprakash
2 жыл бұрын
Tysm
Thanks
Very helpful sir thank u❤️❤️
Nice explanation sir. Mainly, explanation regarding action potential of heart is amazing.
@doctorbhanuprakash
4 жыл бұрын
Thank u so much
Because of u sir anatomy and physiology is interesting
@doctorbhanuprakash
5 жыл бұрын
thank u so much
Best way of teaching Energy level ❤
@doctorbhanuprakash
2 жыл бұрын
Tysm
Weldon... Sir...
Thank you so much dr bhanu, it was really helpful
@doctorbhanuprakash
2 жыл бұрын
Glad it was helpful!
Nice sir, best lecture i have ever seen...
@doctorbhanuprakash
6 жыл бұрын
thank u
Thanq so much sir.....I was so so confused....you clear all the topic well....and make me better understand ....thnq again ....😊😊😊😊😊😊😊😊
@doctorbhanuprakash
3 жыл бұрын
Ur most welcome
hello thanks for ur vedios sir
Nicely explained sir, very precise and details,
@doctorbhanuprakash
4 жыл бұрын
Thank u
very good welldone
@doctorbhanuprakash
2 жыл бұрын
Thanks for liking
Tnk you sir
Great!!
@doctorbhanuprakash
3 жыл бұрын
🤝🤝🤝
Thanx from yemen sir🤗
Very very very nice video
Sir plz make some videos on respiratory system (anatomy, physiology, pathology, diseases?
Excellent explanation
@doctorbhanuprakash
3 жыл бұрын
tysm
He teaches like nursing masters guys very clear concepts for medical topics same like them good
@doctorbhanuprakash
Жыл бұрын
Thank u so much
Super way to deliver about to SA node
@doctorbhanuprakash
3 жыл бұрын
Tysm
You're the best sir 👍👍👍
@doctorbhanuprakash
3 жыл бұрын
So nice of you
👏👏👏great video sir!!
@doctorbhanuprakash
2 ай бұрын
Glad you liked it!
Amazing video sir
@doctorbhanuprakash
3 жыл бұрын
Thanks a lot
Amazing explanation sir. thank you sir.
@doctorbhanuprakash
4 жыл бұрын
You are most welcome
incredible video quality.
@doctorbhanuprakash
3 жыл бұрын
Glad you enjoyed it
Thank you
@doctorbhanuprakash
3 жыл бұрын
You're welcome
Thank You Sir
@doctorbhanuprakash
2 жыл бұрын
Most welcome
17:22 sa node starts
Awesome video
@doctorbhanuprakash
4 жыл бұрын
Thank u
Excellent
@doctorbhanuprakash
4 жыл бұрын
Thank u
Thank you sir for detailed explanation. Sir, I have a doubt........during slow action potential of SA node, Ca ion influx which causes depolarisation, But how this large amount of Ca ion get back to extra cellular fluid ?
Thank you so much sir 💕
@doctorbhanuprakash
3 жыл бұрын
Most welcome
Thanks 🇵🇰
Thanks sir
@doctorbhanuprakash
4 жыл бұрын
So nice of you
Thank you sir🙂
@doctorbhanuprakash
2 жыл бұрын
Most welcome
🙏🙏🙏🙏excellent sir
@doctorbhanuprakash
3 жыл бұрын
Keep watching
What happens to refractory period in fibrillations?
Thanks a lot sir.... helpful 😊
@doctorbhanuprakash
3 жыл бұрын
Most welcome
Nice
@doctorbhanuprakash
2 жыл бұрын
Thanks
👍💯
@doctorbhanuprakash
4 жыл бұрын
🤝🤝🤝
Thank u so much sir.... ❤️
@doctorbhanuprakash
3 жыл бұрын
Most welcome
Super 100
Why SA nodal fibers are slow and myocardial fibers are fast???
Thanks and love from Pakistan 😍
@doctorbhanuprakash
4 жыл бұрын
Thank u so much
thanks dr. dark
@doctorbhanuprakash
3 жыл бұрын
Keep watching
@AbhishekSwami_
3 жыл бұрын
@@doctorbhanuprakash ji guru ji
Thank you so much sir ❤️ really need it
@doctorbhanuprakash
3 жыл бұрын
All the best
@hizbakhan6425
3 жыл бұрын
@@doctorbhanuprakash thanks
Wait.... Won't it be like base of heart gets repolarised first and then the bundle at atrioventricular septum?
Respected sir , I want to say that sir last i had tacharcardia episode 16 july 2021 , undocumented 192 heart rate measured by oximeter , i had dizziness , palpitations these all syptoms but i had totaly awareness that time , before this episode i had diagnosed as hypochondria by psychatrist in 2018 , i prescribed medicine for six months , but i had anxiety attacks some times , before episode on that day i have cardic neurosis that i had heart attack and i took atenlol beta blocker but then suddenely this tachardia episode happened, so after that i took many psychotherapy from psychologist and my anxiety reduced but i went to cardiologist he diagnosed me AvNRT , he said to me that during panic attack or sinus tacharcardia could not exceed 160 heart rate so its definitely svt episode? So there is any possibility sinus tacharcardia to reach 192 heart rate ? My birth date 16/04/1986. After that i have never tachardia episode happen, so but you would said about this .i shall be very thankful to you if you replied me 🙏. Your sincerely Gurmeet singh
Why RMP is due to K+ in cardiac muscle??
sir i want to see the sa node stucture
Sir digoxin blocks na k atpase pump
nice explanation sir super 👌👌👌👍
@doctorbhanuprakash
4 жыл бұрын
Thank u
Ligand gated channels... pls teach about it sir
I'm Irish...up India..
Sir sa node n av node heart ko chalata hai( power deta hai) but sa node or av node ko enargy (power) kahain se milati.. hai
good one...sir did nt mention anything about threshold in action potential?
@doctorbhanuprakash
5 жыл бұрын
threshold will be thr in sa.nodal action potential but not in cardiac muscle action potential
NICE.I HAVE SUBSCRIBED YOUR CHANNEL.NEW CHAPTERS ARE AWAITED
@doctorbhanuprakash
5 жыл бұрын
sure many gonna be added , thank u
Plz explain what is the energy source of SA node..
@MedBees
4 жыл бұрын
For our body initial source is oxygen. While aerobic respiration supports normal heart activity, anaerobic respiration may provide additional energy during brief periods of oxygen deprivation. And oxygen is supplied by CORONARY ARTERIES.