Atrioventricular reentrant tachycardia (AVRT) & AV nodal reentrant tachycardia (AVNRT)
Вставка
- Опубліковано 7 лип 2014
- Created by Bianca Yoo.
Watch the next lesson: www.khanacademy.org/test-prep...
Missed the previous lesson? www.khanacademy.org/test-prep...
NCLEX-RN on Khan Academy: A collection of questions from content covered on the NCLEX-RN. These questions are available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License (available at creativecommons.org/licenses/b....
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan Academy’s NCLEX-RN channel: / @khanacademynclex-rn7898
Subscribe to Khan Academy: ua-cam.com/users/subscription_...
Best video on the internet regarding this topic. Very few people can clearly and adequately explain it. Amazing job! Thank you!
take THİS: ua-cam.com/video/yLI4yj1TZhc/v-deo.html
Agreed!!
Totally agree 👍🏽
I spent so much time trying to find a good explanation on UA-cam, this was by far the best and most concise. Thank you so much!!
i'm crying, literally. got incoming internal medicine exam in 2 days, found this video, really give me a hope to pass the exam with flying colours. thank you very much, ma'am.
Hahaha samalah 😭
Everyone: trying to study for exams
Me: trying to make sense of what's wrong with my heart
Can you explain your symptoms
ER nurse here, been on the floor for 3 years and this is hands down the best video I've found and keep coming back to for refreshers
Stumbled across this topic while doing my own extra research study. Your presentation is absolutely fantastic, and I believed you just made my next three-and-a-half-year of miserable life a little bit brighter. Cheers!
This is the best video I could find on this difficult topic!
This is wonderful. I gotta give a seminar about this in about 9 hours and now I know how to do it well. Thanks a bunch.
wow! you explained it amazingly well...thanks a lot!!
Thank you for explaining what’s going on with my heart so clearly 💕👍🏽
I'm not a medstudent, I'm just here because it seems I suffer from this. Thanks for the video, it is nice to get a better insight into the condition
Holy shit what a video.
Been trying to learn this for the last year.
You have one very happy Paramedic student.
Thankyou.
this made it so clear. THANK YOU
much more clear than my professor explained in the class. thanks
This was so helpful, thank you so much!!
This is the best video I could find on this topic, Thank you so much
such an amazing way to explain svt
Best explanation i ever found. Satisfied much.
Thank You so much for the thorough explanation. I was diagnosed in 1998 with AV Nodal Reentry Tachy, had an ablation shortly thereafter to treat the condition. However, after the procedure my doc informed me that the affected area was too close to the a/v node, and he was not able to completely get all of it. So fast forward to today, I average 4 to 6 skipped beats per minute, with the occasional runs of tachy occurring. I am back on the heart meds, taking Metoprolol extended release 100mg 1x per day. I just somehow feel like this will be the bugger that gets me in the end. At least I now know what is happening inside my chest, Thank You :)
This is amazing. Thank you so much!
Really very well explained! Thankyou
Thank you for creating this!! :)
I thought i could never understand this.. bestestestestet explination.. thank you soooo much❤
Best video so far i found on this topic
I have watched many videos its my favourite video of all time.
Thank you
wow !!!! now , I understand this concept much better !!!!! thank you !!!!!!!!!!!!
AMAZING video, Thank you very much!
Just amazing. Thank you.
just amazing, I wouldn't have understood this topic without your video!
Did you understand why the fast pathway of the AVNRT (8:02) is the one with the long refractory period? Why is it faster when the AP takes more time to recover? Doesnt make sense to me honestly
Thank you so much for this wonderful explanation 😊
super helpful! thank you!
Thank you so much!! I finally understood it.
wow just wow ...thank you
Thanks a lot! Crisp explanation
Awesome 👍 explanation. Good work👏🏼👏🏼👏🏼
Ok if i pass my cardiology exams i will own it to you. really
+athena ky Have mine next tuesday...this is the first video that makes things clear...started to loose my hope
Andrei Plopeanu Girl don't loose your hope! Keep on trying. Cardiology is a pain in the ass. I was crying like a little baby the day before my exam. But I assed the exam :) Don't stop trying :)
Andrei Plopeanu ce specialitate ti-ai ales la rezi? 😅
THIS VIDEO ALONE SHOULD REPLACE ALL MY ARRHYTMIA LECTURES, I ADORE YOU
Did you understand why the fast pathway of the AVNRT (8:02) is the one with the long refractory period? Why is it faster when the AP takes more time to recover? Doesnt make sense to me honestly
AMAZING Video THANK YOU! the only question I have regarding the AVNRT is: What do the 2 sketches on the right exactly represent in the heart? Is the straight line before the branch the AV node and the two branches coming from it the right and left ventricel?
as below. Extreeeeemely well presented!
god, this is so clear. thank you
Perfect!
Thank you so much! You saved me.
It's pretty good. The vdo make me easy to learn about AVNRT and AVRT. Thank you!,!!
Im a 5stage pharmacist from Iraq thanks you alot❤
Love the explaination ty
Thank you!
thanks a lot for a great explanation
very well explained 👍
Wonderful job ... great video...
8:27 Yep, that is perfection! 🎉
Amazing thank you !!
Simple but excellent explanation...👍
thank you for this video
beautiful! thanks
You did an awesome job!
Just wish u talked alittle more about other accessory pathways.
Thanks a lot !!! Really helpful!!!
Thankyou!! Best video
great video!
Thank you 🙏
Great video! Can you tell us what software you've used to create this video?
so good thank you from an intern!
Very useful, thank you
Thank you so so much!
8:14 so does that mean normally impulse conduction in avn down to bundle of h n so forth is done by fast pathway n not slow ? cuz u said slow comes down hits fast which is refractory n it goes refractory itself? plz any help
So helpful thank you
Thank you
Excellent explanation tq so much
THANK YOU!!!
that was very good thanks
Thanks🙏
Amazing from Italy
Much helpful video.. gud job👌👌
Thanks for the video. With an accessory pathway such as wpw or lgl conducting in the presence of afib with rvr it isn’t safe to give a nodal blocker such as adenosine, beta blocker, cc blocker, or even amio. However, procainamide is considered safe. What is it about the pharmacology of class Ia anti-dysrhythmics (thinking of the relatively flat phase 0 action potential in the av node that makes it safe and not prevent conduction in av node?
at 5:36 she said that the impulse can travel from the accessory node back to the AV node and cause a tachyarrythmia, my question is, since A/V node has a refractory period and can regulate the rate and rythm, why will the A/ V node cause tachyarrythmia, as in why will it let the impulse from accesory pathway through to begin with?
Thank youuu
you are awesome! :)
Thank you!!!!!!!
u r brilliant
wow... leaving Thursday morning for mapping study plus or minus ablation with possible cryoballon... my hearts insane... I hope it works. thank you for this video!! would avrt or avnrt cause 17 pauses in 48 hours with the longest being 8.7 seconds?
Thank you
Thanks !
First time in my life understanding the difference
3rd question, since the reentry phenomenon is going to revolve around the AV node and the accessory pathway in a vicious cycle manner, there will be new electrical signals coming from above (SA node/atrial pacemaker cells) too right? wouldn't that cancel off the reentry mechanism and lead to a normal anterograde conduction again, if that's the case, how can it still be said "the reentry circuit phenomenon takes place over and over and over again".. because it doesnt..??
The normal sinus rythm (SA node signal) will be blocked due to the refractory period of the reentrant circuit. And you are correct, the sinus rythm might stop the AVRT if timed precisely.
Genius!
Is it normal for nodes to have slow and fast pathways?! In the first example, how come the slow pathway doesn't go down the tract? Why is it halted when the fast pathway is going through refractory period?
Wow I didn't know that the normal AV node has 2 pathways :-o none of my books mentions it :P thanks!
The normal AV node has only one pathway, physiologically. The presence of two pathways is a congenital defekt.
Thank for the video! Why does the AV node not work as "the gate keeper" for the conduction from the accessory pathway in AVRT?
Because the accessory (extra) pathway shouldn't be there in normal anatomy, the AV node is at the "gate" but it cannot stop electrical activity from crawling through a hole in the fence 100 yards away. (I think that makes sense)
Why does the AV node have 2 pathways? What's between them? The AV node feels like the most important thing in this conduction system, with the SA node right behind it. What is the proper physical (anatomically close) structure to a healthy AV node and how is different in AVNRT?
what happends to the P wave in SVT in AVRNT ???
Love you 😘
This video was really great.helped me to understand this difficult topic could i know the doctors name?
My lecturer's slide on this topic is so annoying and confusing. Thanks so much for making this very clear
Can AVNRT re-enter back to atria as it loops around AV,what is the atrial rate/rhythm if ventricular was around 150 in that example,thank you..
Really great job.
You made it look really easy.
I just have a little question here.
What is the significance of having a slow pathway & fast pathway?
Smn Commented theres only one pathway physiologically but in congenital defect, theres 2
Thank you, excellent video. My only comment is that the normal QRS width is .08-.12ms, this means that in order for it to be narrow complex the parameter should be
Also a question, is this something one is born with? Or can this be caused later on in life? I never had any problems until I abused a cathinone called 3mmc for over a year. After a few ECG's my doc told me it's was AVNRT. I just wonder if I caused this entirely by the substance abuse or if I only 'triggered' it.
Very good lecture. The only thing I would change is that the slow and fast pathways are not really "in" the AV node. The slow pathway is between the tricuspid annulus and the coronary sinus and the fast pathway is on the other side of the coronary sinus. Otherwise, excellent presentation.
more specifically it is in the triangle of coch...tendon todaro area. but YEAH!
maam, avnrt this one refer to slow-fast right? what abt fast-slow and slow-slow?
interesting, the refectory period is basically the same thing as a capacitor charging and discharging.
WOW now that you put it that way ...... that is so right
Not all heroes wear capes.