Convulsive pre-syncope

Posted by sb4ca @sb4ca, May 16, 2025

Does anyone with autonomic dysfunction or similar ever experience this convulsive form of pre-syncope? Mine is related to orthostatic hypotension and I just thought everyone had these symptoms with it but now I understand it's pretty rare. It's also why I kept falling when all this started happening. I have absolutely no control over my limbs and they just jerk spastically on their own along with more typical symptoms like tunneling and loss of hearing. Honestly I thought it was a type of seizure. I'm just looking for any information about it or more advice. I can tell it's coming and crouch down on the floor. I can't imagine the scene if I was elsewhere and not at home.

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@sb4ca
That does sound scary.

What testing and treatments have you had so far? Are you taking any medications? What conditions have you been diagnosed with? What types of specialists are you working with now?

REPLY

Yes, what is causing your orthostatic hypotension. That is possibly linked to the additional symptoms.

REPLY
Profile picture for dlydailyhope @dlydailyhope

@sb4ca
That does sound scary.

What testing and treatments have you had so far? Are you taking any medications? What conditions have you been diagnosed with? What types of specialists are you working with now?

Jump to this post

My cardiologist diagnosed me. I think OH is one form of autonomic dysfunction. The autonomic system controls things like blood pressure, breathing, heart beating and all the things the body does behind the scenes. Once diagnosed I don’t see any specialists. I have to stay hyper hydrated and eat salty snacks per my cardiologist.

REPLY

@sb4ca I think you have some complexity with this issue of syncope. I am suspecting that because of scar tissue and tightness in your neck from cervical spine surgery and perhaps muscle spasms, that it may be able to affect nerves involved with your heart rate or blood pressure. The body has a mechanism for when blood pressure gets too high that causes syncope. That used to happen to me because I was fearful of trauma and pain and anxious about it and I would pass out. That was described to me as my body's way to diffuse a situation of blood pressure getting too high due to fear that essentially dilated blood vessels to drop pressure instantly. I could always tell when it was coming like you. It sounds like you are in a similar situation. Do you know what triggers this for you?

Have you talked to your spine specialist about this?

What may possibly be beneficial would be to do myofascial release therapy to loosnen tight scar tissue and tight muscle tissue that may be provoking the nerve nearby.

Here is our discussion on MFR therapy.
https://connect.mayoclinic.org/discussion/myofascial-release-therapy-mfr-for-treating-compression-and-pain/
There is a provider search at this link.
http://mfrtherapists.com/

REPLY
Profile picture for sb4ca @sb4ca

My cardiologist diagnosed me. I think OH is one form of autonomic dysfunction. The autonomic system controls things like blood pressure, breathing, heart beating and all the things the body does behind the scenes. Once diagnosed I don’t see any specialists. I have to stay hyper hydrated and eat salty snacks per my cardiologist.

Jump to this post

@sb4ca
My teen son has a heart defect, Reynauds syndrome, and POTS like symptoms. He never had the Covid shots but had Covid 2 times. I understand that Covid can damage the nervous system.

My son’s cardiologist also suggested super hydration with electrolytes included (like LMNT brand) to help insure absorption and retention to maintain blood pressure and also eat salty snacks. 🙂 He was also told to make sure to get sleep and exercise plus limit video games/screen time. That is really hard for him. 😉

REPLY
Profile picture for Jennifer, Volunteer Mentor @jenniferhunter

@sb4ca I think you have some complexity with this issue of syncope. I am suspecting that because of scar tissue and tightness in your neck from cervical spine surgery and perhaps muscle spasms, that it may be able to affect nerves involved with your heart rate or blood pressure. The body has a mechanism for when blood pressure gets too high that causes syncope. That used to happen to me because I was fearful of trauma and pain and anxious about it and I would pass out. That was described to me as my body's way to diffuse a situation of blood pressure getting too high due to fear that essentially dilated blood vessels to drop pressure instantly. I could always tell when it was coming like you. It sounds like you are in a similar situation. Do you know what triggers this for you?

Have you talked to your spine specialist about this?

What may possibly be beneficial would be to do myofascial release therapy to loosnen tight scar tissue and tight muscle tissue that may be provoking the nerve nearby.

Here is our discussion on MFR therapy.
https://connect.mayoclinic.org/discussion/myofascial-release-therapy-mfr-for-treating-compression-and-pain/
There is a provider search at this link.
http://mfrtherapists.com/

Jump to this post

No, it has never occurred to me it could possibly be from my spine. I know that pre-syncope can be caused by other disorders, including in the setting of seeing blood, fears, etc like you described but I believe it's related to low and not high blood pressure. Isn't that called vasovagal syncope? Mine is the same thing but caused by my blood pressure dropping too low when I sometimes stand up. I only know that my cardiologist told me it is not neurological. My blood pressure runs low to begin with so I guess it doesn't taken much for it to go too low. That's really apparent when I'm sick too. Thanks for the info

REPLY
Profile picture for dlydailyhope @dlydailyhope

@sb4ca
My teen son has a heart defect, Reynauds syndrome, and POTS like symptoms. He never had the Covid shots but had Covid 2 times. I understand that Covid can damage the nervous system.

My son’s cardiologist also suggested super hydration with electrolytes included (like LMNT brand) to help insure absorption and retention to maintain blood pressure and also eat salty snacks. 🙂 He was also told to make sure to get sleep and exercise plus limit video games/screen time. That is really hard for him. 😉

Jump to this post

Poor boy. Hydration is to increase blood volume as far as I know. Has he experienced pre-syncope where he drops to the floor? That would flip me out as a Mom knowing of the heart defect. I hope everything is OK. That's tough.

REPLY
Profile picture for Jennifer, Volunteer Mentor @jenniferhunter

@sb4ca I think you have some complexity with this issue of syncope. I am suspecting that because of scar tissue and tightness in your neck from cervical spine surgery and perhaps muscle spasms, that it may be able to affect nerves involved with your heart rate or blood pressure. The body has a mechanism for when blood pressure gets too high that causes syncope. That used to happen to me because I was fearful of trauma and pain and anxious about it and I would pass out. That was described to me as my body's way to diffuse a situation of blood pressure getting too high due to fear that essentially dilated blood vessels to drop pressure instantly. I could always tell when it was coming like you. It sounds like you are in a similar situation. Do you know what triggers this for you?

Have you talked to your spine specialist about this?

What may possibly be beneficial would be to do myofascial release therapy to loosnen tight scar tissue and tight muscle tissue that may be provoking the nerve nearby.

Here is our discussion on MFR therapy.
https://connect.mayoclinic.org/discussion/myofascial-release-therapy-mfr-for-treating-compression-and-pain/
There is a provider search at this link.
http://mfrtherapists.com/

Jump to this post

@jenniferhunter
I landed on this note you wrote to sb4ca because I am looking for answers to an incident I had about a week ago which resulted in a hospitalization and testing that is still going on.

As background, I am a 73-year-old man, diabetic (30+ years well controlled with insulin), IBS (50+ years), arthritis in multiple joints, unexplained breathing and shortness of breath issues, hyperacusis, acute pancreatitis (thanks to Long Covid) and 24 years in the Air Force exposed to asbestos, possible nuclear exposure, and who knows what in Saudi Arabia. I weigh 195 and am 70 inches tall. Although a long-term diabetic, I have no foot or eye issues. I have carpal tunnel, arthritis, and a pinched nerve in my right arm/hand. I have never had any cardiac issues, I had ACDF surgery in 2015 where C1 and C2 had been fused since birth; the surgeon had to fuse through C5.

I was in a grocery store last week approximately five hours after eating breakfast (no further food that morning) when I suddenly started feeling lightheaded and almost immediately experienced problems seeing anything other than a blur. I thought it was my body telling me I needed food so I managed to get to the cracker aisle about two aisles from where I was. My plan was to rip open a box of crackers to eat something. That’s the last thing I remember until I woke up in an emergency room an hour or so later. An employee at the store witnessed what he thought was a seizure. He said I went stiff and was shaking uncontrollably before I fell over gripping the cart and taking it with me. The EMTs treated it as a seizure, but the ED doc seemed to feel differently. I had bit both my tongue and my lip. I have a contusions on my left elbow and on the right abdomen above the belt. Although I have no memory of the incident, the ambulance ride, and the first hour in the ED, I apparently was functioning to some degree according to witnesses. I am told my eyes were open in the store and I was mumbling incoherently. When I asked my daughter several days later how she was notified of this, she said I called her. Sure enough, there is a call on my cell phone to her before I was “awake” in ED. She said I wasn’t making much sense and she asked me to hand the phone to someone else who apparently filled her in. But, I had to have made the call because I would have had to unlock the phone.

I was given a brain CT scan and an ultrasound echo of the heart shortly after regaining consciousness. Also, chest x-rays and an x-ray of my neck because my daughter had arrived by then and told them of my old ACDF surgery. I was initially admitted to observation which was changed to inpatient status a few hours later, I was given a 24-hour EEG with x-rays repeated. Since discharge, I have had a brain MRI (no results yet) and I have an outpatient 24-hour EEG scheduled in a couple of days.

The neurologist I see for the right hand/arm issues is associated with the hospital where the EMTs took me, so she knew of my admission and insisted on seeing me the day after discharge, She ordered the brain MRI and the outpatient EEG. My primary doctor was also notified of my hospitalization and insisted on an office visit which will take place in a couple of days.

I was sort of agreeing with the neurologist that this was an incident of convulsive syncope without seizure, but I wasn’t completely sold on her diagnosis until reading your comment about scar tissue from neck and/or cervical surgery. I wasn’t sold on the neurologist’s thought that there had been a sudden restriction of blood flow to the brain. However, I can see that scar tissue in the neck might cause pinched nerves or restricted blood flow and I know I already have a pinched median nerve on the right side. I will ask the primary when I see her on Tuesday if that could be any connection. I have not had any reason to see the neurosurgeon since 4 weeks after the surgery 11 years ago,

In hindsight, I realize I had one incident like this a few months ago. I was kneeling down working in a garden at my daughter’s house. When I stood up I immediately felt faint and lightheaded, but wrote it off to a vasovagal episode brought on by getting up too quickly on a hot day. As I tried to clear my head that day, my vision blurred and I stumbled to a nearby fence where I bent over and put my head down on the top of the fence. That was as close as I could get to putting my head between my knees. I recovered in about a minute without losing consciousness.

Okay, lots of information here. Is cervical scar tissue something I need to discuss with my primary this week or the neurologist a week or so later? Could cervical scar tissue affect a nerve or blood vessel enough to reduce blood flow to the brain, bringing on convulsive syncope?

Thanks. I think the Mayo Clinic site is great.

REPLY
Profile picture for fpc3 @fpc3

@jenniferhunter
I landed on this note you wrote to sb4ca because I am looking for answers to an incident I had about a week ago which resulted in a hospitalization and testing that is still going on.

As background, I am a 73-year-old man, diabetic (30+ years well controlled with insulin), IBS (50+ years), arthritis in multiple joints, unexplained breathing and shortness of breath issues, hyperacusis, acute pancreatitis (thanks to Long Covid) and 24 years in the Air Force exposed to asbestos, possible nuclear exposure, and who knows what in Saudi Arabia. I weigh 195 and am 70 inches tall. Although a long-term diabetic, I have no foot or eye issues. I have carpal tunnel, arthritis, and a pinched nerve in my right arm/hand. I have never had any cardiac issues, I had ACDF surgery in 2015 where C1 and C2 had been fused since birth; the surgeon had to fuse through C5.

I was in a grocery store last week approximately five hours after eating breakfast (no further food that morning) when I suddenly started feeling lightheaded and almost immediately experienced problems seeing anything other than a blur. I thought it was my body telling me I needed food so I managed to get to the cracker aisle about two aisles from where I was. My plan was to rip open a box of crackers to eat something. That’s the last thing I remember until I woke up in an emergency room an hour or so later. An employee at the store witnessed what he thought was a seizure. He said I went stiff and was shaking uncontrollably before I fell over gripping the cart and taking it with me. The EMTs treated it as a seizure, but the ED doc seemed to feel differently. I had bit both my tongue and my lip. I have a contusions on my left elbow and on the right abdomen above the belt. Although I have no memory of the incident, the ambulance ride, and the first hour in the ED, I apparently was functioning to some degree according to witnesses. I am told my eyes were open in the store and I was mumbling incoherently. When I asked my daughter several days later how she was notified of this, she said I called her. Sure enough, there is a call on my cell phone to her before I was “awake” in ED. She said I wasn’t making much sense and she asked me to hand the phone to someone else who apparently filled her in. But, I had to have made the call because I would have had to unlock the phone.

I was given a brain CT scan and an ultrasound echo of the heart shortly after regaining consciousness. Also, chest x-rays and an x-ray of my neck because my daughter had arrived by then and told them of my old ACDF surgery. I was initially admitted to observation which was changed to inpatient status a few hours later, I was given a 24-hour EEG with x-rays repeated. Since discharge, I have had a brain MRI (no results yet) and I have an outpatient 24-hour EEG scheduled in a couple of days.

The neurologist I see for the right hand/arm issues is associated with the hospital where the EMTs took me, so she knew of my admission and insisted on seeing me the day after discharge, She ordered the brain MRI and the outpatient EEG. My primary doctor was also notified of my hospitalization and insisted on an office visit which will take place in a couple of days.

I was sort of agreeing with the neurologist that this was an incident of convulsive syncope without seizure, but I wasn’t completely sold on her diagnosis until reading your comment about scar tissue from neck and/or cervical surgery. I wasn’t sold on the neurologist’s thought that there had been a sudden restriction of blood flow to the brain. However, I can see that scar tissue in the neck might cause pinched nerves or restricted blood flow and I know I already have a pinched median nerve on the right side. I will ask the primary when I see her on Tuesday if that could be any connection. I have not had any reason to see the neurosurgeon since 4 weeks after the surgery 11 years ago,

In hindsight, I realize I had one incident like this a few months ago. I was kneeling down working in a garden at my daughter’s house. When I stood up I immediately felt faint and lightheaded, but wrote it off to a vasovagal episode brought on by getting up too quickly on a hot day. As I tried to clear my head that day, my vision blurred and I stumbled to a nearby fence where I bent over and put my head down on the top of the fence. That was as close as I could get to putting my head between my knees. I recovered in about a minute without losing consciousness.

Okay, lots of information here. Is cervical scar tissue something I need to discuss with my primary this week or the neurologist a week or so later? Could cervical scar tissue affect a nerve or blood vessel enough to reduce blood flow to the brain, bringing on convulsive syncope?

Thanks. I think the Mayo Clinic site is great.

Jump to this post

@fpc3

That must have been very scary. And scary not knowing the cause. This is the original poster. I just wanted to comment that I never had memory loss for any significant amount of time. I was aware that my vision was becoming tunneled, I did have hearing loss and had hurt myself from not being able to stand. But I remember that I couldn’t stand up despite trying and my arms clearly were moving or jerking on their own. But all this passes in minutes. I believe that is a key sign of OH vs something different. I started getting these spells before my surgery. My surgeon knew I had OH because I listed it on my medical history. And my BP tends to run really low anyway. I honestly think my symptoms are pretty classic for this form but the fact you lost time/memory sounds different. Or it triggered something else that’s unknown right now. I hope you find answers. That honestly sounds so scary. So sorry

REPLY
Profile picture for fpc3 @fpc3

@jenniferhunter
I landed on this note you wrote to sb4ca because I am looking for answers to an incident I had about a week ago which resulted in a hospitalization and testing that is still going on.

As background, I am a 73-year-old man, diabetic (30+ years well controlled with insulin), IBS (50+ years), arthritis in multiple joints, unexplained breathing and shortness of breath issues, hyperacusis, acute pancreatitis (thanks to Long Covid) and 24 years in the Air Force exposed to asbestos, possible nuclear exposure, and who knows what in Saudi Arabia. I weigh 195 and am 70 inches tall. Although a long-term diabetic, I have no foot or eye issues. I have carpal tunnel, arthritis, and a pinched nerve in my right arm/hand. I have never had any cardiac issues, I had ACDF surgery in 2015 where C1 and C2 had been fused since birth; the surgeon had to fuse through C5.

I was in a grocery store last week approximately five hours after eating breakfast (no further food that morning) when I suddenly started feeling lightheaded and almost immediately experienced problems seeing anything other than a blur. I thought it was my body telling me I needed food so I managed to get to the cracker aisle about two aisles from where I was. My plan was to rip open a box of crackers to eat something. That’s the last thing I remember until I woke up in an emergency room an hour or so later. An employee at the store witnessed what he thought was a seizure. He said I went stiff and was shaking uncontrollably before I fell over gripping the cart and taking it with me. The EMTs treated it as a seizure, but the ED doc seemed to feel differently. I had bit both my tongue and my lip. I have a contusions on my left elbow and on the right abdomen above the belt. Although I have no memory of the incident, the ambulance ride, and the first hour in the ED, I apparently was functioning to some degree according to witnesses. I am told my eyes were open in the store and I was mumbling incoherently. When I asked my daughter several days later how she was notified of this, she said I called her. Sure enough, there is a call on my cell phone to her before I was “awake” in ED. She said I wasn’t making much sense and she asked me to hand the phone to someone else who apparently filled her in. But, I had to have made the call because I would have had to unlock the phone.

I was given a brain CT scan and an ultrasound echo of the heart shortly after regaining consciousness. Also, chest x-rays and an x-ray of my neck because my daughter had arrived by then and told them of my old ACDF surgery. I was initially admitted to observation which was changed to inpatient status a few hours later, I was given a 24-hour EEG with x-rays repeated. Since discharge, I have had a brain MRI (no results yet) and I have an outpatient 24-hour EEG scheduled in a couple of days.

The neurologist I see for the right hand/arm issues is associated with the hospital where the EMTs took me, so she knew of my admission and insisted on seeing me the day after discharge, She ordered the brain MRI and the outpatient EEG. My primary doctor was also notified of my hospitalization and insisted on an office visit which will take place in a couple of days.

I was sort of agreeing with the neurologist that this was an incident of convulsive syncope without seizure, but I wasn’t completely sold on her diagnosis until reading your comment about scar tissue from neck and/or cervical surgery. I wasn’t sold on the neurologist’s thought that there had been a sudden restriction of blood flow to the brain. However, I can see that scar tissue in the neck might cause pinched nerves or restricted blood flow and I know I already have a pinched median nerve on the right side. I will ask the primary when I see her on Tuesday if that could be any connection. I have not had any reason to see the neurosurgeon since 4 weeks after the surgery 11 years ago,

In hindsight, I realize I had one incident like this a few months ago. I was kneeling down working in a garden at my daughter’s house. When I stood up I immediately felt faint and lightheaded, but wrote it off to a vasovagal episode brought on by getting up too quickly on a hot day. As I tried to clear my head that day, my vision blurred and I stumbled to a nearby fence where I bent over and put my head down on the top of the fence. That was as close as I could get to putting my head between my knees. I recovered in about a minute without losing consciousness.

Okay, lots of information here. Is cervical scar tissue something I need to discuss with my primary this week or the neurologist a week or so later? Could cervical scar tissue affect a nerve or blood vessel enough to reduce blood flow to the brain, bringing on convulsive syncope?

Thanks. I think the Mayo Clinic site is great.

Jump to this post

@fpc3 First, I have to thank you for your service. A few of my uncles served in WWII. A friend of mine had an event similar to yours where he passed out and was incoherent and belligerent and was taken to the ER and hospitalized for a few days. He had a sudden loss of blood supply to the brain that was not a seizure, but doctors were unable to determine why. He recovered and was sent home.

In my own experience, if my neck is tight, and I bend it forward, I could have an increase in heart rate. I also have thoracic outlet syndrome that increases tightness of my neck and shoulder and is related to tight fascia and scar tissue. With TOS, there is compression of nerves and vessels, and it causes diminished pulse rate when turning my head. That is one of the diagnostic tests for it. Nerves for heart rate and breathing will travel through some neck areas that could be tight. I also have asthma and allergies that cause phlegm, and tightness due to TOS limits the chest wall movement on the left, so my lungs don't move as well causing phlegm to accumulate. When too much of that happens, it can easily turn into a lung infection. All of that can affect my heart rate and my resting heart rate goes up with excess phlegm, and I can feel it with some discomfort on the left side of my chest. I start doing some physical therapy called myofascial release to loosen the chest muscles. Basically, I push with my hand or a tool of chest muscles to create a shearing force against the barrier of tightness in the muscle. I just hold until it starts to release, and I start feeling the phlegm start to clear.

The issues that I have had that started sudden dizziness and vertigo where when my C1 & C2 were rotated spontaneously due to muscle spasms. The vertebral arteries run inside the cervical vertebrae, and that stretched them, altering some of the blood flow to the brain. That was corrected by realigning the vertebrae properly which relieved the dizziness. That has not happened since my C5/C6 fusion 10 years ago. You need stability at the C1 skull level. That is also related to jaw alignment. I am currently working on that with a specialist and my C1 is staying put where it belongs.

I think there could be a lot of conditions that could have similar symptoms to your experience and doctors need to figure out what is triggering your events. That has to be a lot on your plate. I am glad that you seem to be proactive in facing this and looking for answers. I don't know what could be triggering your episode and don't have the expertise to diagnose anything, but I can share my knowledge related to my experience. Some doctors know about MFR and embrace it and some do not. PT helps me a lot.

If you wanted to explore myofascial release therapy, here is a discussion where you can learn more. I have done a lot of this, and it helps and helps my breathing improve when I'm struggling. Your lungs are nearly all fascia that connect to the fascial network outside of the lungs. MFR can get tissue moving again and let fluids circulate again. Tissue can get stuck and dehydrated. This is just physical therapy. There is a provider search at https://mfrtherapists.com/ . MFR can help loosen surgical scar tissue. I also use MFR on scar tissue related to my previous ankle fracture. It tends to tighten up periodically and to stop my ankle from weakening and collapsing, I need to loosen the scar tissue, so the joint isn't compressed together. All surgery creates scar tissue, and it tends to get tight. It may be worth working on that.

Myofascial Release Therapy (MFR) for treating compression and pain
https://connect.mayoclinic.org/discussion/myofascial-release-therapy-mfr-for-treating-compression-and-pain/
What is your next step?

REPLY
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