Atrioventricular reentrant tachycardia (AVRT) & AV nodal reentrant tachycardia (AVNRT)

Created by Bianca Yoo.
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[@Emine958]

Best video on the internet regarding this topic. Very few people can clearly and adequately explain it. Amazing job! Thank you!

[@fatilyuz4011]

take THİS: kzbin.info/www/bejne/r32sZaygZrmNnsU

[@Dgenz24]

Agreed!!

[@MyLittleFarmhouse]

Totally agree 👍🏽

[@MegaMrDanne]

Everyone: trying to study for exams Me: trying to make sense of what's wrong with my heart

[@anuragprasad8700]

Can you explain your symptoms

[@abeam91]

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.

[@guccigirl3158]

Hahaha samalah 😭

[@frankchiang9441]

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!

[@Sara-vg9xu]

I spent so much time trying to find a good explanation on KZbin, this was by far the best and most concise. Thank you so much!!

[@sumanuel]

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.

[@psid8]

This is the best video I could find on this difficult topic!

[@94lovinlife]

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

[@graciouslygrace4782]

wow! you explained it amazingly well...thanks a lot!!

[@MyLittleFarmhouse]

Thank you for explaining what’s going on with my heart so clearly 💕👍🏽

[@Bellg]

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

[@mrkekman9526]

Holy shit what a video. Been trying to learn this for the last year. You have one very happy Paramedic student. Thankyou.

[@anteater2536]

much more clear than my professor explained in the class. thanks

[@TheAlirra]

this made it so clear. THANK YOU

[@MohammadrezaSd4574]

This is the best video I could find on this topic, Thank you so much

[@rishithaaa]

Best explanation i ever found. Satisfied much.

[@akshayholla346]

such an amazing way to explain svt

[@doctorsofgoldenhour]

Best video so far i found on this topic

[@jamesperry6298]

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 :)

[@amandaforesteire2615]

This was so helpful, thank you so much!!

[@syedshah6378]

I have watched many videos its my favourite video of all time. Thank you

[@zara123999]

Really very well explained! Thankyou

[@nebrasabuabed1115]

wow !!!! now , I understand this concept much better !!!!! thank you !!!!!!!!!!!!

[@luisahah123]

THIS VIDEO ALONE SHOULD REPLACE ALL MY ARRHYTMIA LECTURES, I ADORE YOU

[@tulibaumbusch9973]

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

[@athenaky8555]

Ok if i pass my cardiology exams i will own it to you. really

[@andreiplopeanu8133]

+athena ky Have mine next tuesday...this is the first video that makes things clear...started to loose my hope

[@athenaky8555]

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 :)

[@ABCEDEFG911]

Andrei Plopeanu ce specialitate ti-ai ales la rezi? 😅

[@maheshwariv7744]

I thought i could never understand this.. bestestestestet explination.. thank you soooo much❤

[@JesusBeloved18]

This is amazing. Thank you so much!

[@summaiyafathima2689]

Awesome 👍 explanation. Good work👏🏼👏🏼👏🏼

[@dnavaez]

AMAZING video, Thank you very much!

[@user-zw8zp8xw3m]

Im a 5stage pharmacist from Iraq thanks you alot❤

[@ravidsakumar1]

Wonderful job ... great video...

[@artushhovhannisyan1683]

Just amazing. Thank you.

[@ayeshaansari3518]

Thank you for creating this!! :)

[@shantanusingh9571]

Thanks a lot! Crisp explanation

[@deepikaaggarwal5124]

Thank you so much for this wonderful explanation 😊

[@seymss15]

Thank you so much!! I finally understood it.

[@Sallasdup]

as below. Extreeeeemely well presented!

[@tulibaumbusch9973]

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?

[@thomassutedja9285]

Simple but excellent explanation...👍

[@harveenkaur1713]

super helpful! thank you!

[@seykimbob8531]

It's pretty good. The vdo make me easy to learn about AVNRT and AVRT. Thank you!,!!

[@sumityadav-dw3be]

Much helpful video.. gud job👌👌

[@MohamedAhmed-jf4qu]

wow just wow ...thank you

[@johnsonmatola6601]

very well explained 👍

[@a.m.e.r.k1805]

thanks a lot for a great explanation

[@williamyates5863]

so good thank you from an intern!

[@srilakshmikalidindi2461]

just amazing, I wouldn't have understood this topic without your video!

[@tulibaumbusch9973]

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

[@g81417]

great video!

[@c.linfordnitin7390]

Thanks a lot !!! Really helpful!!!

[@user-wt4id1hn4g]

Thank you so much! You saved me.

[@shakezilla29]

god, this is so clear. thank you

[@joshfraser3991]

You did an awesome job!

[@joshfraser3991]

Just wish u talked alittle more about other accessory pathways.

[@Humbleman2024]

8:27 Yep, that is perfection! 🎉

[@TheShabooka]

Love the explaination ty

[@findaika]

Thankyou!! Best video

[@Nndngn]

Excellent explanation tq so much

[@aleyup8158]

Very useful, thank you

[@imacheese1]

Great video! Can you tell us what software you've used to create this video?

[@k.f9096]

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

[@hatirose7503]

beautiful! thanks

[@Nogirlsnolife]

thank you for this video

[@danielnavarro-orozco1161]

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

[@nefertiti7367]

First time in my life understanding the difference

[@preetisinha4484]

Amazing thank you !!

[@luqi01]

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?

[@shazaaa8444]

So helpful thank you

[@SuperYaniv12]

Thank you so so much!

[@gavisel]

Amazing from Italy

[@peterfuchs4858]

Perfect!

[@selamyemane1640]

Thank you!

[@jamesmcnally4571]

that was very good thanks

[@dodadoda517]

u r brilliant

[@036484639207]

Thank you 🙏

[@zahramomeni4007]

This video was really great.helped me to understand this difficult topic could i know the doctors name?

[@anjalivijayan2294]

Thank you

[@mohammedkabir3485]

THANK YOU!!!

[@mustafaalnagdi2815]

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?

[@yohannchineegadoo6444]

Smn Commented theres only one pathway physiologically but in congenital defect, theres 2

[@SouryaYallapragada]

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?

[@Lindokuhlem]

you are awesome! :)

[@fredtzystuck5794]

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?

[@kalldagreat]

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..??

[@mohamadawada4656]

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.

[@Mysttable]

Thanks !

[@lauren1359]

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?

[@haiderissa163]

Thanks🙏

[@traumagotmesick6750]

Thank you!!!!!!!

[@elena.derm1]

Wow I didn't know that the normal AV node has 2 pathways :-o none of my books mentions it :P thanks!

[@patrickmorris5377]

The normal AV node has only one pathway, physiologically. The presence of two pathways is a congenital defekt.

[@chijiokenwambam5854]

My lecturer's slide on this topic is so annoying and confusing. Thanks so much for making this very clear

[@iriinaradoi]

Thank youuu

[@markyounger1240]

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.

[@merngerm]

more specifically it is in the triangle of coch...tendon todaro area. but YEAH!

[@queenmavichak6183]

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?

[@becjarvis1432]

Thank for the video! Why does the AV node not work as "the gate keeper" for the conduction from the accessory pathway in AVRT?

[@CountZero78]

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)

[@alcarinna]

Thank you

[@johnydavilma8409]

Genius!

[@shuenshuen]

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.

[@jakeparelta7846]

So In AVRT, there can be two menifestation? (1) SA send impulses, but accessory tract is in refractory.So impulses go to normal AV conduction.When impulses reach to ventricles, the accessory tract finish refractory period.Then, impulses go from ventricles back to atrai before SA node produes another impulse (2) SA node produces impulses, some go through normal AV nodal pathway. And some go through accessory tract. Those who go through accessory tract reach faster as well as AV nodal conduction lates causing delta waves in ECG. 1.So what about ECG for 1st menifestation? 2. Did I understand correctly?

[@hustle-kn5xp]

This is 100000 times easier than I thought. Most people do a poor job explaining it (or perhaps they do not understand it themselves)

[@ProfYounge]

The video says that a supraventricular tachycardia involves a narrow QRS

[@hamizahmohdrazib4825]

Lorraine Gary what i was being taught, essentially narrow QRS means that the problem doesnt lies on the ventricular muscles. To make it simple, broad QRS should make you think of either bundle branch block or ectopic(s) that originates from the ventricle if that makes sense?

[@poliklolik]

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..

[@josephs8029]

Love you 😘

[@nha8909]

what happends to the P wave in SVT in AVRNT ???