Supraventricular Tachycardia (SVT, PSVT), Animation
Major forms of SVT, or PSVT: AV nodal reentrant tachycardia (AVNRT), atrioventricular reciprocating tachycardia (AVRT), and atrial tachycardia. ECG (EKG), pathophysiology, causes, signs and symptoms, prevalence, diagnosis and treatments.
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Voice by : Marty Henne
Supraventricular tachycardia, SVT, refers to rapid heart rhythms that originate above the ventricles, in the atria or AV node. It’s also called paroxysmal supraventricular tachycardia, for its episodic nature - the rhythms come suddenly, and go spontaneously.
In normal conduction, electrical signals are initiated in the SA node, and travel throughout the atria to reach the AV node. The AV node is the gateway to the ventricles. It delays the passage of electrical impulses to the ventricles to ensure that the atria have ejected all the blood into the ventricles before the ventricles contract.
SVT occurs when abnormal electrical pathways bypass or corrupt the AV nodal checkpoint. As a result, heart rate accelerates, and the ventricles contract before they are properly refilled. These ineffective contractions may cause lightheadedness because the brain is not getting enough oxygen.
By definition, SVT includes all rhythms that originate above the ventricles. In practice, however, SVT refers only to AV nodal reentrant tachycardia (AVNRT), atrioventricular reciprocating tachycardia (AVRT), and atrial tachycardia.
AVNRT happens when the AV nodal tissue has 2 pathways with different conductivity, one slow and one fast. If an atrial impulse arrives at the AV node when one pathway is conductive and the other is refractory, it will follow the conductive pathway. However, it may circle back through the second pathway if this becomes excitable again before the signal leaves the node. If this continues, a self-perpetuating loop, called a re-entrant pathway, may arise. With each cycle, the signal is transmitted down to the ventricles. The atrial and ventricular rates are identical, regular and fast. AVNRT is the most common type of SVT in adults, and is twice more common in women than in men.
In patients with AVRT, there is an additional connection, an accessory pathway, between the atria and ventricles. The pathway acts as a shortcut to the ventricles, bypassing the AV node. It allows part of electrical impulses to arrive to the ventricles sooner, causing a so-called “pre-excitation”, which can be seen as a shortened PR interval on an ECG. Because part of the ventricles depolarize earlier, ventricular depolarization develops in a more gradual fashion and lasts longer, resulting in a slurring slow rise of the initial portion of the QRS complex, known as Delta wave, and QRS prolongation. However, the presence of the accessory pathway alone is not enough to cause tachycardia. AVRT develops when electrical impulses travel down one pathway, either the normal or accessory, then back up via the other, creating a loop, or re-entrant circuit. The frequency of this loop determines heart rate and can be very fast. AVRT can be orthodromic or antidromic depending on the direction of the loop. AVRT is more common in children.
Atrial tachycardia is caused by an ectopic focus in an atrium, and can arise from any of the three mechanisms: enhanced automaticity, reentry, or triggered. Ventricular rhythms are regular and fast. P wave morphology varies depending on the site of origin and tachycardia mechanism. Atrial tachycardia is common in children with congenital heart disease, but it may also be triggered by environmental factors in healthy people.
Because of the episodic nature of SVT, symptoms come and go and may not be present during physical examination. ECG findings may be normal, and the condition is often misdiagnosed as anxiety or panic attacks. Assessment should include continuous monitoring with a portable ECG recording device.
When SVT is caused by an underlying condition, it must be treated. Most people who have no underlying disease and have an obvious trigger may not require treatment. For others, treatments and lifestyle changes can often control the condition.
Пікірлер: 108
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I have PSVT and sometimes describe it like a chestburster. I don't know if anyone else has humor over theirs, but it's helping me to cope with it. Thank you for this video, by the way :)
@JC-un4bg
5 ай бұрын
The can do a procedure to stop it . They burn a nerve I think . Go through your groin
Great explanation here. This happened to me and I suffered 9 cardiac arrests one day last year. On the way to hospital my bpm went to 315! Finding videos like this help you understand it better. Thanks
@Alilamedicalmedia
Жыл бұрын
Welcome, and good luck!
@KaitlynMcCary
11 ай бұрын
Holy shittt! I was in the movie theatre yesterday when my heart randomly shot up to 210 and got up to 253 in the ambulance 20 min later. They had to give me adenosine, I can’t imagine what 315 would feel like. Glad you’re okay!!
@ColdVsIce
11 ай бұрын
Do you have an underlying heart issue? SVT rarely causes cardiac arrest. Maybe you were in vtach or torsades de pointed
@masonqureshi5217
11 ай бұрын
@@ColdVsIce I’m no medical man so perhaps I stand corrected and having just checked again, it may have been VFib. I certainly do not wish to spread misinformation.
@ColdVsIce
11 ай бұрын
@@masonqureshi5217 wow mason, you survived a very dangerous heart arrhythmia.. wish you the best in health my friend.
Could you please do a video on thalamocortical dysrhythmia and its connection to tinnitus, VSS, HPPD, and other disorders? I like the way you explain things, articulate and simple. & people with these disorders should know the true cause, without the academic language barrier in the way.
So glad I found this! Been having heart problems since after getting sick in January. Now if only I could afford to get a doctor's appointment and get one of those portable monitors.
That's my diagnosis, thanks it is informativ
Very helpful.Thanks very much.
Great video, thank you!
Thanks This video help me a lot 🙏
I just had mine ablated after 12 years of increasingly worse episodes. Best decision ever.
@brayden-tucker-music
8 ай бұрын
Glad to hear! I’ve just seen my cardiologist to book mine in. Looking forward to being finished with these episodes!
@CarlosServin-qj4cb
6 ай бұрын
Is that safe I need one also
@Sauceeboxx
5 ай бұрын
Isnt that a life threatening surgery
@dinnercakes
5 ай бұрын
All cardiac procedures have risks, but this is a somewhat lower risk than a more invasive surgery. In my case, the benefits far outweighed my risks and I am hoping to live a much longer life.
@Theratsintrenchcoat
14 күн бұрын
I'm hoping to get it done at some point, hopefully this year or next.
Excellent sir
I loved this explanation
Super explanation 👌👌
Very good explanation ,thank you so much
Amazing 😍so useful and helpful
I'm 53 and I been having these episodes since I was 17 years old etleast that's when I remember they started
@Maryammmohamed1444
Ай бұрын
How do you deal with them?
@jasonwimberly5636
26 күн бұрын
Me too.
Thank you for such informative vdo
Hello sir.... Beautiful❤❤❤❤ brilliant explanation sir.... I'm Prashant, a dental surgeon student in an institution in New Delhi.... I feel very happy.... If I would have met you, I surely have invited you for dinner or some respectable treat.
Very Helpful. Thank You 🙏
@Alilamedicalmedia
Жыл бұрын
Welcome 😊
Thanks for this information.
@Alilamedicalmedia
Жыл бұрын
Glad it was helpful!
Love it ❤
Super explaination
@Alilamedicalmedia
Жыл бұрын
Thank you 🙂
nicely explained..I just had one earlier.
this is really tormenting me so much omg 😭
@prestonkingsley7170
Жыл бұрын
no like this did NOT make me feel any better 😭
This is very helpful. I am going to my doctor tomorrow and needed more information about my findings from wearing a electrical monitor.
Thx so much for making this video. It is helpful. I am also interested in what treatments could be considered for AT
I noticed mine at age 12 and ablated at the age of 15 on the left side of my heart and my heart rate got up to the 250 to 260 bpm
It took dokters 3 years to find out I have SVT since it only happens 3/4 times a year taking meds now (bisoprolol) and an ablation is under consideration, thanks for the video.
@RamboBrazyy
11 ай бұрын
Yea cause they have to catch the SVT actually active that’s always the tricky part cause it never seems to act up when yu actually get there lol hope your fine now tho
@petervernelen6784
11 ай бұрын
@RamboNoLove ablation is scheduled for mid October, fingers crossed 🤞
If the episodes lasts long I get so dizzy I threw up. When I threw up it suddenly stops. Idk why but it happens everytime. So now everytime I get long episodes I just push myself to throw up.
@sviktor4
2 жыл бұрын
You just need to learn the valsalva maneuver. Basically just tense up your muscles like on the toilette, or try to blow a bottle or your thumb until you feel dizzy or feel the rush when your heart rate normalizes again.
@fart5786
Жыл бұрын
@@sviktor4 بلزحمه انا لا اعرف النكليزيه ولاكن بنتي عمره 11 سنه وتشعر بهذا المرض هل خطير
@mahihamdy7710
Жыл бұрын
As when u vomit this stimulates your vagus nerve causing like a valsalva maneuver
@rafeeali1203
Жыл бұрын
@@fart5786 visit a doctor of your country, don't look for an answer online. No body can give you fully clear answer without a check up.
@devanthiranthevaralthurair5934
Жыл бұрын
See doctor first. 1 high BP, 2very annoying Go see doctor check heart first.
Was PSVT once called PAT which l was dx'd with in my 20s? I have been on a daily beta blocker for 50 years which controls the problem. I nevet hear PAT mentioned anymore.
This sounds familiar. My heart will start beating extremely fast and then just stop. Told a doctor but I said possibly anxiety? He did nothing beyond nodding. Should I be seeing a heart specialist?
@Pabloperes675
3 жыл бұрын
Maybe maybe not
@officialspaceman1190
3 жыл бұрын
that sounds like possible svt, if you have an apple watch you can save an ecg when it happens again.
@Mcazares92
2 жыл бұрын
Please do.. I was told the same thing at 15. Asked for a heart specialist and got surgery at 16.
@Yerfdog1
2 жыл бұрын
Yes go see a cardiologist so they can put you on a holter monitor and analyze your heart activity for a period of time to capture these events you mentioned.
@kikibrown9548
2 жыл бұрын
Hello, I’m late responding. I was sent to a Cardiologist for a work up. I wore a monitor for about two weeks. It showed that I had a few runs of V tach, and a lot of PVC’s. The key is whether or not the palpitations cause symptoms. I had a bad feeling when the palpitations would occur. I felt very dizzy and uncomfortable. It felt like I was about to pass out.
Hi, can you do a video that talks about opioids, and can you tell what are the differences between Oxycodone and Morphine, apart from the equianagesic values, thanks
@Alilamedicalmedia
3 жыл бұрын
We have a video on opioids, look for it on our channel!
@giacomopedde3046
3 жыл бұрын
@@Alilamedicalmedia I saw it, it was very Interesting, congratulations I love your channel, I was asking wich differences where between Oxycodone and Morphine, like what differences there are when they act on the brain, I thought that it would be interesting, thanks again for the time
Been experiencing this these past months up until now specially on times when I encountered emotional stress.😩
@dilly8758
Жыл бұрын
How bad is it? I was diagnosed with PSVT in 2016 and had to get surgery done to get rid of it. My heart rate would go up to 240bpm and I would be near passing out. Definitely one of the scarier moments in my life.
@aaribhasan
Жыл бұрын
@@dilly8758 how are u doing now?? Do u get palpitations??
@tonysphotography9425
Жыл бұрын
i think im having these , is actually from 2009 im struggling with it , doctors just say i dont have nothing and told me is panic attacks , some told me is the vagal nerve that get signals from the brain and triggers this .. (i think can be triggered by anxiety as i had some 2 years without symptoms, the more exercise i do the better ) but sometimes iit triggers with me just being on a chair for few seconds ..
@RamboBrazyy
11 ай бұрын
@@tonysphotography9425I’m Ngl my guy if it’s Been since 2009 your good😂💯just change your diet around a little could be the sodium in your diet or spicy foods
I had this before I was pregnant but now I get 2-5 sustained, symptomatic episodes a day. I'm on Metoprolol and Flecainide but they don't seem to do much. They're delivering me at 39 weeks but I'm hoping to convince them of 37. I just need my heart to either go back to normal or get an ablation. I live alone and I'm scared of blacking out with a newborn
@RamboBrazyy
11 ай бұрын
Just ask to yo your doses on metoprolol until your surgery it does help 💯I think it’s just the fact your pregnant
❤
How Long Are Episodes Supposed To Last On Average?
The paramedics thought i was experiencing this just yesterday. But the confirmed it was not. It mightve been from the yayo and dabs i was doing smh
Did you mean straykids not seventeen? Cause I don't remember seventeen having a member named felix
I have been trying to learn what i have for the last 3 years, my doctor said it might be svt and my great grandfather had wpw
I hate having these episodes and really dislike being cardioverted but don't have much choice🙂
@brendacurrie358
Жыл бұрын
Same here it’s scary - I eventually had an ablation and it solved it!!!
@naxbeats2614
Жыл бұрын
Beta blockers doesent help?
@irishman4671
Жыл бұрын
@NS I see my cardiologist next month to figure it out. I have Neurocardiogenic Dysautonomia, so I have a pacemaker that's resolved the bradycardia. Now, we need to tackle the SVT.
@RamboBrazyy
11 ай бұрын
@@naxbeats2614they definitely do well for me at least I’ve always only had svts like once a year but 25mg of metoprolol twice a day will knock my heart rate from 205 to 65 bpm in a hour inna half
@TheElephantInTheRoom12
7 ай бұрын
I fear being cardioverted more than the SVT episodes.
Where in sweden, can i find a trusted place to have ablation ?
@Jahnyboy
10 ай бұрын
Uppsalas Universitetssjukhus eller Karolinska i Stockholm. Har gjort två ablationer i Uppsala och den senaste gången blev jag frisk.
@hni7458
5 ай бұрын
Ja ja, du behöver inte söka sådant här på YT, din läkare hjälper dig, och kanske redan har. Vi har otroliga centra för ablationslabb. Rena nöjet att vara på ett sådant, jag har haft två i Huddinge. Det lurigaste kanske är om man drar ut på tiden hos husläkaren - se till att komma till en kardiolog; de vet hur en slipsten ska dras.
السلام عليكم بنتي عمرها 11 سنه وتعاني من هذا المرض هل خطير
@aymanezaroual455
Жыл бұрын
لا
@V.I1-pe2ki
8 ай бұрын
لا عادي مجرد خفقان يبدا فجأه وينتهي فجأه
I have svt attacks
@inamullahkhan6458
Жыл бұрын
How old are you and from how long you have svt
First
I hate getting these
@PoisonApple-pd6ih
8 ай бұрын
Same. It's like... Me: 🧍♂️ (standing and doing nothing at all) My heart: 🫀🪘🥁🪘🥁🪘🥁🪘🥁
@TheElephantInTheRoom12
7 ай бұрын
@@PoisonApple-pd6ih I understand! Its the worst. I feel like a sitting duck.
Bc mere ko psvt jab episode atta hai toh heart rate 150-185 ke around rehti hai but 3 min ke baad normal hojati h 75 pe gir jati h dimakh ka dahi ho rakha h
@lovebalbal48
3 ай бұрын
Hello brother mere ko bhi yehi hai Mera toh bhut bura Haal hoo jata hai saas Lena mushkil ho jata hai psvt ki wja se doc ne mujhe beta blockers par dalla hai abhi
@lovebalbal48
3 ай бұрын
App ne doc ki slash li hai ?
@ironmn_890
3 ай бұрын
@@lovebalbal48 haan anxiety ke wajhe se hota tha abb nhi hota unhone propnaolol 20 mg aur anxiety medicine di thi 1 month khane ko abb shi hai
lund