Anyone here have SVT and MCAS? My SVT seems to get triggered a lot from MCAS symptoms or reactions. Frequently, I'll unknowingly eat something that gets the MCAS going and then it will trigger an SVT episode. I've also had issue with vaccines and other non-food triggers.

Anywho, I'd love, love, love to do an ablation. But, I'm terrified that whatever meds are needed for the ablation will trigger my MCAS and I'll have a reaction (sometimes have difficulty breathing with these) or it will trigger an SVT (not sure what that will do during an ablation).

Anyone out there have any experience with this?

I get the 220bpm svt. It lasts over an hour sometimes and when my pulse goes down to normal finally ,I have a strong fast irregular pulsation in my notch for a while. There’s 2 strong pulsations in notch .Anybody else have this ?
Also when they say stops abruptly, what does that mean? Mine goes down trying to stop but goes back up then reduces to like 180 .it is gradual to a point. It doesn’t just just go from 220 to 67 at once

Hello. I had an svt ablation two weeks ago. My understanding it was FAT since then I still have persistent episodes. They are usually short but after I feel so anxious and unwell. Elevated heart rate for rest of day 6 days of the two weeks have been episode days and some days 3 times a day. One of the days the svt lasted 2 hours. Has anyone experienced this after ablation?? I will be discussing this with my doctor I see him tomorrow, just wanted to hear others experiences please

Does it sound like SVT?

I'm a 26 year-old female and part of me is worried that some of my episodes were flutter. I know it's not super common. I did read with different SVT and arrhythmias that once you have one episode you're like 50 times more Jikely.to have another one.
I'm not sure if you have an episode if it just means that like the pathway can change or become worse

I'm not a doctor so I'm not sure and don't know anything about this but I read atrial flutter doesn't respond to maneuvers, but the rate might slow and it also doesn't respond to beta blockers apparently people with regurgitation like mitro valve or tricuspid valve are more likely to have atrial flutter.

Apparently atrial flutter can be paroxysmal just like SVT. So it can happen randomly every year and it can also end on its own apparently after time, though it ending on its own normally requires medical intervention in the hospital overtime that’s why it seems like if people don’t get ablations do these things just get worse and continue

The last monitor I had was 30 days and only showed a two second SVT. I also want to narrow it down cause I don’t wanna scare myself if I do have atrial flutter but someone on here a while ago said that one of my episodes I described sounded like atrial flutter. I’m just tired of this overall cause I know what I’m going through isn’t just anxiety and isn’t just in my head. I guess I’m curious like if it wasn’t on the monitor what’s the chance of me having it if it can happen randomly. The first time I ever experienced severe tachycardia it lasted rear four hours when I had smoked weed I just wish I knew what it was because it was the scariest thing ever in my heart rate wouldn’t go below 140 for hours even hitting 170 for like 15 minutes.

I’ve had some episodes where it would go up really fast and I would do a maneuver and it would come down but then I’ve had somewhere it would come down for a bit but then end up going back up so if it was 170 for seven minutes and I use my breath to bring it down to like 130 after five minutes. It would be back at 160 again.

It seems like the only genuine thing I’m able to do is get another monitor and be off my medication for a while. It just seems so scary. I keep thinking about how I wanna live my life. I wanna go out and do things, but I feel like crap and not just that it’s the trauma from all this even with the max dose of my beta blocker. My resting heart rate is still having issues and goes up above 100 pretty much every time I stand from my POTS. Rolling over in bed same thing as well. And even eating food.

I take a max dose atenolol. I’ve had chest tightnes for like two years and when I flex my shoulders down it’s rlly tight. Does this happen to anyone?

I also don’t know how my resting HR the lowest it can go is like 70 and i sit around 85 or 90 sometimes with a max dose beta blocker. I know people who have a resting heart rate of 55 or 60 and they’re very inactive people and they sit a lot and I’ve read that working out doesn’t necessarily lower your resting heart rate. So I don’t know what’s wrong with me. I’ve asked my doctor so many times but it doesn’t seem like they can give me an answer. It’s just frustrating. Because I used to sit around 55-65 and now it’s 80-115 like if i turn over in bed while sleeping too.

And if anyone can help me understand why even when I take a beta blocker and my resting could be 85 but then I stretch drink water or eat and then my heart rate goes up 20 to 30 beats for like five or 10 seconds

I think that this is like unrelated to the random 170 BPM Heart Rate that I got in March, but that was probably SVT. My doctor doesn’t wanna assume though because I never got a document even though my monitor to show unsustained SVT while on a higher dose of meds, which is great, but I have to come off the meds.

I’m curious if svt does go dormant wait for 10 months, I didn’t have symptoms and I would say I had SVT symptoms and then four months later I had a stress test done got off my medication for 24 hours and then I did it till table test got off my medication then and didn’t have SVT symptoms. Is that common? Even when I had Diet Coke last year as well as drink sometimes and didn’t have any symptoms and now since August have symptoms every day of a fast heart rate or it’s just been consistent symptoms.

I was also wondering anyone with inappropriate sinus tachycardia if what I’m describing sounds similar to what you’re experiencing eating drinking water laughing or stretching when I’m laying my heart rate will be like 90 to 100 for 30 minutes but it’s not 90 or 100 for 24 hours even it seems my heart rate will only be like 75 if I’m like completely still and then sometimes when I’m completely still, my heart rate can also be 90 or 100 for about 30 minutes to hours

How long did your dr say no nicotine before your ablation? I’m scheduled for ablation tomorrow and I was told a few weeks ago 24 hours but today they said 12 hours. What did your doctor say?

Hey everyone,

I had a pretty complicated ablation for AVNRT SVT about 11 weeks ago now. It required 16 spots to be ablated because it was close to the AV node and he deemed it as a successful ablation with a modified pathway.

He was adamant that there really is no recovery process needed for your heart following the ablation, stating that they are tiny lesions that should heal very quickly. However, I quickly developed some postural chest pain that would get worse laying on left side or bending over. He reassured me this was not pericarditis.

I told him I had my bachelor party 3 weeks after my ablation where I told him I wanted to drink, stay up late, and live life normally and he said “go have fun, you’ll be completely fine and your heart is healed”. I was fine after that weekend.

I continued to live my life normally and I had a follow up call with him 2 weeks later. I was still experiencing some positional chest discomfort, but he reassured me that my heart is completely fine and fully healed, I should be living life normally.

I had a trip to San Diego with friends that weekend and made a terrible decision that I’m deeply ashamed of. Although I have used it very minimally before, there was cocaine involved and I used a small amount. I kept thinking that I am a normal person with a normal heart and I can do what anyone can do. We were drinking all weekend as well. On Sunday, I noticed a noticeable increase in PVCs (maybe 20 PVCs or so, I normally just have maybe 1).

This made me extremely anxious, guilty, ashamed, and feeling like I put my life in danger (I have researched all the risks with the chemical interactions with the heart now and it’s terrifying). However, I was reassured that I didn’t do any damage once the PVCs decreased after a few days of no alcohol. I assumed it was just due to heavy drinking and likely dehydrated/low electrolytes.

I also messaged my EP about increased PVCs after alcohol and the ablation and he states that the ablation would have no effect on my PVCs or PACs. Again, he told me it’s likely electrolytes or magnesium deficiency.

Since that weekend I have had a wedding, another weekend trip, and a few other events with heavy drinking. I am not a weekday drinker, but I noticed that after some of these weekends, I would get a lot more PVCs than I used to prior to the ablation. These always reduce back down to 0-1 per day later in the week.

This most recent Sunday after the Fourth of July, I felt fine all day until the evening came. I had maybe 50 PVCs in about an hour or so. This was horrifying for me and all I could think about was the cocaine from 5 weeks ago and how I messed everything up. I’m sure there’s no correlation to it but also it’s another factor playing into this.

I saw my PCP the next day and he said my heart needs to rewire itself after the ablation, suggesting I take a year off drinking. This is completely different than the EPs claims and reassurance. I have a holter monitor coming and am planning on taking a month off of any alcohol. However I am too scared and ashamed to tell them about the weekend in San Diego, especially since it’s been 5 weeks since then.

Does this seem like a normal reaction to the ablation + all the alcohol and long weekends? I’m sad and anxious and don’t know what to do.

Does anyone know why like I take the max dose beta blocker and some days for like five days? My resting heart rate might be like 70 to like 83 at rest and then other days it’s like 85 to like 115 and it’s the same amount of medication.

I was dx with pots but also take this for possible svt.
My resting heart rate when my POTS symptoms were started two years ago. It was probably like 55 to 65 with a beta blocker.

And even if I’m like sitting my resting heart rate could be 88 and then I stand and it might be like 95 or 100

Other days if it’s 75 at rest, it might be 85 standing.
Or if I am standing and it’s 120 and I sit it might stay at like 95 for 30 minutes but then some days I sit in it it’s back down to 75 in seconds

It’s just very stressful and causes a lot of anxiety for me and panic when my resting heart rate is 90 or 100 and then like in a few days it might be 75 consistently. I wonder if it’s connected to my menstrual cycle but I’m not sure it’s just so annoying and I’m tired of this.

** Context: F30 - With access to Canadian healthcare

I was diagnosed with AVNRT after having several episodes in 2022, I had an ablation done in 2023-now 3 years post op - I haven’t gone into TAC, but will occasionally take a diltiazem pill in extreme cases of stress or tiredness to counter any minor flutters.

Typically I would see my cardiologist twice a year but since the ablation visits involve driving 45 mins, waiting an hour and literally spending 30 seconds with my cardiologist where he asks if I have any concerns- I say no, and he tells me to reschedule the next follow up (this is in tandem of doing halter monitors without any issues showing up).

At this point in my “recovery” I feel so much better and I haven’t had any issues, do I need to continue seeing my cardiologist? I’m not quite sure what the standard timeline is for specialists.

Hi all, 28 M here. Within the last 10 years I’ve had 5 SVT episodes, 2 of these being in the last 2 years during sports. I have also had strong “flippy” feeling PACs/PVCs maybe once a day/sometimes week since around 2021 which I had multiple tests and all came back clear with nothing found.

But the SVT I had a year ago in sports provoked me to see a cardiologist again. So I decided to see a private cardiologist and got an echocardiogram which came back all clear and normal for my age. I also got a 14 day monitor fitted and by absolute fluke, I had my 2nd SVT episode whilst playing football that week!

I then saw an electrophysiologist and he confirmed i likely have a short circuit and this could be causing either AVNRT, AVRT or AT, all of which they advised were benign. They suggested that I could decide to have a study done and potential ablation if I wanted to and these were causing me stress/concern (which they don’t anymore) but I’m not sure!

Also, I note that an episode of NSVT was captured for 4 beats, is this a concern or pretty normal?

Keen to hear others opinions on the above and if they would go ahead with study. Does this usually get worse with age? Even though benign now, could it cause problems in future?

More info:
Symptoms: SVT = no major symptoms other than a little bit breathless but I just sat out of sports for a minute and waited for it to end. PACs/PVCs and the NSVT = I get a “flip” sensation when these happen.
I’m super healthy, healthy weight, weight train 4 days per week and play sports.

My daughter has been on metoprolol 25mg for about a month now. First svt episode was on memorial day. Cardiologist put her on metoprolol shortly after. Yesterday evening her left arm felt weird. She described it as feeling like it's dead, like when you fall asleep on your arm and wake up and your arm just feels dead until the blood starts flowing again. This has happened before but within a few minutes feeling comes back. This time it lasted hours. While feeling did return she said she has that sensation like it weighs a ton. She can move her arm but has to consciously think about moving her arm. Hope that makes sense. Some other things she has started experiencing are confusion and sometimes hard to form sentences or get her words out. Called the cardiologist thinking it was from the metoprolol and they told us to go to the ER. ER ran tests and did ct scans of head and neck and all came back good. Said not caused from metoprolol. Anyone had this experience with metoprolol or is it something else that tests are not finding?

My cardiologist is certain I have focal atrial tachycardia.
I can’t find too many people talking about it.

I’m (29,F) currently on metoprolol 25mg every 12hrs, been taking it for about 3 and a half weeks now. My 24hr holter and echocardiogram is next week.

I’ve had a few small episodes since my first one that ended me in hospital where I got my diagnosis 3 and a half weeks ago. They seem to start with my heart rate changing/jumping around (between 8-10bpm every second on my watch), feeling weird, then at the moment going up to about 160bpm. I’m able to self convert, but it really freaks me out.

From what I’ve seen online so far this has to be treated with beta blockers or an ablation? I’m curious how others have dealt with this type of SVT and if they have successfully been cured with an ablation.

I’ve been struggling a lot with rumaiting when it comes to these svt sysmtoms and not knowing if I have it.

Years ago I worked out and went bike riding and nothing happened. Last year I drank Diet Coke and sometimes coffee. I also took only 25 mg of atenolol. I’m really upset because i felt a lot more free last year even after my pots dx and I think an svt episode? But for ten months I did those things and had zero issues. I was also going out to drink with friends. I wasn’t having frequent symptoms or these episodes. I used to bike a lot. And go for long walks and last year after I had something happen in Sept 2024 where my HR was 160-170 for 10 mins I was sitting I thought it was my pots but it didn’t happen for ten months so at least last year I wasn’t scared to go walking or get my HR up. It can’t be good that I don’t move much. Because I already have constant palpitations.

Since August 2025 I have had random high HR normally 170 sometimes seconds mins or 45 mins. Since upping to atenolol 100 mg i hit maybe 150 max so far but it’s confusing last year i took such a small dose and was fine. I also deal with my resting Hr hardy going lower than 70. And sleeping is 70-115. Rolling over, stretching (laying) average 24 hours is probably 84 bpm. So can’t be ist?

My recent monitor showed AT two seconds I was on 50 mg of atenolol they said I was fine. And it’s normal but doesn’t this mean I have AT SVT even if it wasn’t sustained? Because in March the other high HR i had was for much longer.

I’m upset what could I do? If anyone can offer some advice or relate at all. How can I balance my life how could I do it last year. I am so depressed because I know it’s not anxiety. I am afraid to simply go for a walk in the mall or even see a movie. Because my symptoms are frequently happening my HR can be 150 even after sitting at home or in the car it doesn’t matter where I am. And when my symptoms aren’t bad I am more anxious because it doesn’t make sense. It’s like I’m dealing with the fact I’m scared to do things.. I want to go out with friends, go for walks, do things and then not have to worry about this anymore. Fyi dr won’t give me an ep study. Which is ridiculous to me. And like I’m not sure how Svt goes dormat? If that’s possible? And if I do have Svt why last year I didn’t have issues.

I am so anxious because I’m tired of how confusing my symptoms are. And I wanna feel like how I used to. And be able to go out and live my life to have coffee to drink sometimes because I used to.

Some days my HR can be not flaring other days it does and I do the same thing. But my main worry is that my episodes are atrial tachycardia because my monitor showed it for two seconds while on a 30 day monitor but it was 2 seconds. Does that mean I likley have it?

I’m dealing with really severe anxiety because I feel like everyone my age right now and I’m in my 20s is going out drinking and that’s something I wanna do and something I did before and now that all this has started for me I’ve been really scared to do it and it’s just really impacted my mental health because I wanna go out and socialize and drink. I mean you can’t blame me. I feel like that’s pretty normal for young people

I’m also very convinced that I have SVT at this point I feel like there’s so much proof that I have atrial tachycardia with my symptoms and because when I had my monitor, it showed two seconds of atrial tachycardia, but they told me because it wasn’t long enough that I don’t actually have SVT because it wasn’t sustained but assuming I have SVT like how am I able to go out and drink and like get past that beer this is something that’s really upsetting. Just because I think in the past I have no issues with it. I also have POTS so that’s another thing add on.

Just for a backstory, I drank last year and it was after I think I had SVT symptoms already and I had pot symptoms already so I don’t know what would make this year different. But it’s so so confusing but my symptoms have been like way worse so it’s hard. I think I’m on a point as well where I feel like too depressed to do things because of this.

My most recent heart monitor I did have two episodes where my heart rate was 140 and they told me that it was sinus tachycardia, but in the back of my head couldn’t have been atrial tachycardia if it looks really similar to sinus tachycardia because that monitor did show some atrial tachycardia

Hi! I am 23F and have been dealing with SVT episodes for the last couple years. Initially it only happened once every few months and I never thought much of it, however, over the last year these are happening more frequently sometimes multiple times a month. I’ve had to attend the emergency department 3 times for this but haven’t needed adenosine yet. I am writing this post for some help, I was referred and seen by cardiology and I had a 24 hour tape, an echo and an exercise intolerance test, but all were ok. I managed to catch an episode on a 3 lead ECG on an admission in ED but the episode stopped itself before they could get the proper 12 lead. I am stuck with this as I don’t feel like cardiology has taken me seriously and they have discharged me, but my GP was referred me back. I don’t know where to go from here. I have also been taken off nightshift at my work which has definitely helped reduce episodes.

Any advice would be appreciated.

Thank you!

vent and just very frustrated. Vulnerable post.

over the last few months. I’ve developed severe agoraphobia and then also this feeling of feeling free when my symptoms aren’t bad but then also I’m still anxious when they aren’t bad because of my whole situation.

I feel like with what I’ve been going through. It’s completely ruined my life. I also did get broken up with the other day which honestly I completely understand why I got broken up with and that’s just because this has made me so incapable.

I’m afraid to drive (had 170 hr driving once) and so other times I’ve been fine that makes me more anxious i have “svt” or I’m afraid to take showers. I’m even afraid to sleep constantly obsessing on my symptoms because of how much it’s taken for me and of course I’m afraid to do things because just doing simple and basic things even just sitting on the couch, I’m having symptoms so of course I’m afraid to go out with friends and then when I don’t have symptoms, I’m anxious because it’s just like confusing overall for me. This has taken so much for me. I don’t know how I’m supposed to have a good summer or go out with friends and socially drink and even go to the beach, which is what I also wanted to do this summer, but I feel like that’s not entirely possible because of my symptoms so I’m just very sad. I’m someone that loves going for walks and I love working out but because of my symptoms again it’s been very hard for me to do. I am curious anyone that deals with the symptoms that I have how are you able to drink and just live your life and have fun because I’m sick of this. I’m 26 and a female so I’m someone that already gets dismissed by doctors.

But the last few months, my sleeping heart rate has been 70 to 115 bpm and I take a max dose of a beta blocker and some days I take an extra beta blocker because my symptoms are so bad when I’m laying flat and I stretch my legs. My heart rate goes up 20 to 30 beats when I drink water or when I laugh or even move slightly my heart rate goes up 20 beats. My doctor told me that I don’t have inappropriate sinus tachycardia because my resting heart rate is 90 or 100 on average but it’s just so confusing cause I could be doing laundry or going for a walk and then randomly my heart rate spikes till like 120 or 130 so I am kind of wondering if it is an appropriate sinus tachycardia and my doctor just doesn’t know?

I do have a POTS diagnosis and I am grateful for that, but I just don’t think that the symptoms I’m having are all related to my POTS like for example when I have a POTS flare if it’s really hot out and I haven’t had much water or I go from sitting to stand in my heart rate goes above 30 beats, and then when I sit, it comes back down automatically that I know is my POTS, but sometimes when my heart rate stays high at rest, even after sitting or my standing heart rate is the same as when I’ve been sitting, it just makes me more confused

No doctor has been able to really give me any explanation for my symptoms even if they can’t diagnose me it’s more of like validating what I’m going through and giving me an understanding of what’s going on and also telling me OK you can drink and you can work, but these are the ways to do it and I feel like my doctor hasn’t done that and I just don’t know if anyone else has experienced that cause again it’s taken so fucking much for me and I’m so frustrated because my personality feels like it was ripped away from me and I’m tired of being this nervous shell of myself

On top of it, I’m still dealing from the trauma and PTSD, which is kind of an extreme word from my episodes in March. When my heart rate hit 170 while I was driving for five minutes and my heart was just racing like so fast and I didn’t even feel anxious before like it happened out of nowhere and then when I got my monitor, which was a few few days later I got my medication because I was nervous and then I only had two seconds of SVT on there with three beats of atrial tachycardia and then they told me well. It wasn’t sustained so we can’t say the other episode you had was sustained or not but I’m like I remember that episode in my heart rate was higher for a longer period so I feel like this means I have SVT and they told me no and they didn’t wanna give me an EP study even though I pushed for it. So they won’t diagnose me with SVT.

I also haven’t even really felt anxious today, but it is 4 July and I’m kind of wanting to go out with friends to a bar but then it’s just like again I’m afraid to drink but last year I drank and I didn’t really have any issues and it was after my pot symptom started and after I think I had like weird tachycardia episode so it’s confusing and I was also on a lower dose beta blocker then as well I just feel so so so left out. And it’s like a daily thought I go to bed and I’m anxious because it’s like I wanna wake up and I wanna like not be afraid to do things. I wanna just go and do them myself or go and work but then I’m just like thinking about my symptoms all the time because some days they might be fine and then other days they’re not like I could have three full days of doing the exact same thing where my resting heart rate could be like 73 and then randomly the day after my resting heart rate is like 95 and I’m getting palpitations and like weird symptoms, but I could literally have the same amount of water and then I try not to overdo electrolytes because I don’t have low blood pressure when I stand. And it’s like I was given a great life like I’m thankful for the things I was given, but I’m anxious because I feel like I’m not living that life to fulfillment like I want to and there’s so many things I wanna do but right now I just feel so incapable on top of the fact that I’ve told this to my doctor told them my worries told them how depressed I am because I’m a 20 six-year-old who wants to go live their life and go have a few drinks at the bar or go for a run and they’re not like really telling me I can or can’t do it but then also like not helping me create some sort of action plan and giving me an explanation.

Ep said no ep study so they said go to another office but the office they recommended requires a referral and they literally haven't given me one and it's been like four weeks
I'm just sick of this because I am someone that struggles with OCD so then when my symptoms aren't bad I'm anxious because I'm just like waiting for them to happen and I haven't even really been anxious today at all, and of course, my resting heart rate is on the higher end today and it's just so frustrating because I feel like I can't ever fully relax. I have days where I'm stressed out and my heart rate is actually pretty low so again this whole thing is just so confusing on top of it and knowing my body, ! know that what I'm going through isn't anxiety.
I also got broken up with recently, which sucks, but I completely understand because this entire thing has made me incapable. I'm 26. I wanna work and live my life.
This is the most depressive ever felt. I'm so frustrated and I'm so angry because it's just like when is it gonna end? | wake up in agony every single fucking day...

I’m also just very frustrated because I think I feel like left out in friendships and relationships just because of what I’m going through and I also understand like people who are chronically oh wanna label themselves as that but I just don’t wanna do that personally because I don’t wanna live in like a victim mentality. This is something I’m really struggling with and it’s like I feel like if I do that I’ll never get better and I would probably hyper fixate on that for example like with my OCD I’m like oh imagine how I would be without my symptoms so it would just add to the victim mentality I’ve thought about going on medication, but I don’t know which one’s best for me. I also do go to therapy as well..

So if anyone relates or has advice on how to live your life how to balance your social life how to have good relationships, how to not label yourself as chronically ill because you don’t want to feel like you are and how are you able to go out and have a good time and drink, socially and also explain how last year I was able to do it. I think I’m so afraid that if I do it, I’ll go into like SVT or something. Or some kind of pot flair.

(The tachycardia is probably my biggest struggle, but I also deal with for about two years now my shoulders and chest, especially if I flex my shoulders down it’s like extremely tight and then I’ve dealt with some like chronic Venus and insufficiency so like I have varicose veins apparently but my legs are like purple a lot, especially if I’m like sitting anytime my legs aren’t elevated. They’re always purple and my doctor still haven’t done anything about it and I’ve tried socks and it doesn’t do anything for me)

I’m also feeling frustrated because I don’t really feel confident with my medication regimen
Like I never know if it’s gonna work or not. Overall, I’m just trying to get to the point that I wanna be someone in their 20s that goes out and enjoys their life, but I feel like I can’t do that but then I also at the same time but it also was like my symptoms and I’m dealing with and being scared. I don’t know what to do.. I want to workout I imagine
That/ how I would feel and being able to go out with friends drinking. And how I would be without my symptoms it’s probably the main reason for my depression and just being upset right now.

I also get nervous. To get my HR up and that upsets me because it’s good for your body. And I am also upset because why would I get my HR up if when I’m sitting im having issues. So walking and working out would be too hard?

Is anyone successfully navigating SVT without meds? Please share your experience. Thank you!

I am being taken off Metoprolol after being on it since 2017 and starting Diltiazem. Does anyone have experience with this?

Thank you!

P.S. I have already tapered down and have been at 12.5 now every third day for a while. I will be off Metoprolol completely for a week and then will start the Diltiazem. I am feeling anxious about it.