Possiblity of GastroCardiac syndrome?

Treadmill test would be one step (of possibly many) in ruling out heart abnormalities (some cardiologists might advocate using a Holter monitor, conducting a (table) tilt test, cardiac MRI, cardiac CT, an EP study, an echo-cardiogram, and extensive blood work, and possibly a sleep study; cardiologists, especially EP cardiologists, often make extensive use of a wide array of diagnostic tests).

Not mere opinion but fact: There is significant misdiagnosis of Roemheld/Gastrocardiac Syndrome. While there is no single dominant diagnostic protocol, diagnosis of Roemheld Syndrome often requires... intervention & coordination/cooperation between cardiologists & gastroenterologists.

If you are confident that cardiac disease is not primarily causative, then proceeding to gastroenterological investigation might well be warranted, with the primary objective being to rule in or out the presence of a...(sliding) hiatal hernia.

Here's Mayo Clinic's summary of the standard diagnostic options for a hiatal hernia: https://www.mayoclinic.org/diseases-conditions/hiatal-hernia/diagnosis-treatment/drc-20373385

As for treating a (sliding) hiatal hernia (as you'll know from reviewing the introductory characterisation of Roemheld's Syndrome, sliding hiatal hernias often compress/press against the vagus nerve, which is what sometimes causes heart arrhythmias), most treatment is...environmental (pharmaceutical treatment & surgery are rarely necessary or implemented).

Net-net: A Roemheld/Gastrocardiac Syndrome diagnosis is often made based on symptoms in the absence of heart abnormalities. And this is when a gastroenterologist might perform the above diagnostics (or even a colonoscopy and ultrasound to rule out other problems in the abdomen).

All the best.

Get a patch monitor for two weeks. Your PCP can order it or get a second opinion cardiologist.

I did get a patch monitor for 2 weeks, but despite me recording the events, there was nothing particularly abnormal about the logging results

GOOD IDEAL

Gas-X (simethicone) helps me with heart as well as GERD. I take Pepcid as well when things are inflamed. These things help GI, lungs and heart which are all close to one another.

@shoshin thanks for the reference to Roemheld syndrome!
https://en.wikipedia.org/wiki/Roemheld_syndrome
I figured out some of the same treatments, myself, including Gas-X/simethicone, Pepcid, Tums and Klonopin (similar to Lorazepam).

I have several spinal fractures and can experience a feeling of fullness and a feeling that my diaphragm has moved up, before an afib episode. Lifting and reaching will do that, even the tai chi I have always loved. I believe it is related to there being less room for everything and so there is pressure on my heart, but it could also be on the vagus nerve.

Seriously, I am feeling clearer on my triggers! Thanks again!

I'm a 49 year old active male who's been fit my entire life. My main physical activity is cycling. about 10 years ago I began having sudden episodes of tackycardia, highblood pressure and anxiety. For no particular reason my body would go into the flight or fight response soon after a meal. I've ended up in the ER a few times after an episode since it feels like I am or about to have a heart attack. I have seen several cardiologists, nuerologists, urologists and gastrointestinal doctor. After under going many tests, they've never found the cause or problem. It wasn't until two years ago that I linked the episodes to my digestion/ eating. I've suffered from IBS for many years and have been diagnosed with gastritis. On one occurance, I went through a month where I suffered from severe anxiety and depression. Having considered myself a strong minded person, this was the first time I had ever felt this way. It was as if a switch was turned on in my body which I had no control of. During this month I had 3 occurring episodes of fight or flight responses. Doctors could not find an answer to what was causing it since my EKG were fine and all tests were normal. At the time of the episodes my heart rate would spike to 150-165 for a few seconds, My blood pressure would shoot up to 160/110 or so. The episodes lasted anywhere from 2- 10 minutes but my legs and arms felt heavy and I felt tired after each episode. There were days were I just felt so depressed I cried. I had a hard time sleeping due to anxiety. I refused to get on any anti depression or anti anxiety pills as this was not a normal feeling for me. I wanted my doctors to find out what caused this switch to turn on rather than to treat my symptoms. During this time I realized what if I wasnt suffering from IBS but rather it was the cause of my problem. I quickly cut out all sugars, flour, meat and high fat from my diet. I was strictly on fruits, veggies fish and chicken. After two weeks on this diet, the switch was turned off. No more anxiety, no more depression no more fight or flight episodes. I continued on this diet for 3 months and went from 185 to 165 lbs. I began doing some web browsing on diet and my symptoms and came across Romeheld Disease (gastric cardiac syndrome). Needless to say, I tend to get careless about my diet every now and then and but now I'm able to recognize the symptoms before they worsen. Doctors haven't diagnosed me with Gastric Cardiac Syndrome since non of the doctors here are familiar with it. I've given up on Doctors since they're main objective is not find your cure but to make sure you're not dying. Hope this helps someone.

EDIT: Recently, I got diagnosed by Stanford University's Chronic Fatigue Syndrome clinic as having met all criteria of the illness. The formal name is myalgic encephalomyelitis.

Apparently, Stanford is seeing a large number of patients with this condition after the pandemic. They are still doing research, but their current understanding is that patients have contracted a viral infection (COVID, mono, etc) may fight it off successfully, but their immune system goes haywire and may cause inflammation of the nerves in the brain. This can cause all sorts of strange neurological/cardiovascular symptoms, and can be linked to other disorders like POTS. This would explain my strange memory loss symptoms+ heart palpitations/higher blood pressure.

In hindsight, this also makes sense, as I may have indirectly been exposed to COVID by an acquaintance shortly before the pandemic started. I may have also had mono, so perhaps the mono+COVID combination led to some strange effects.

They recently placed me on a new medication called "low dose naltrexone", which has anti-inflammatory properties in small doses. It seems to be helping, especially when combined with anti inflammatory foods + supplements!

For people with long term illnesses like chronic fatigue syndrome and fibromyalgia long Covid has been a god send. Finally Western medicine is taking these people seriously. Finally they are looking at various mechanisms what causes long term inflammation and how to treat it. Low dose naltrexone was first reported using it on Fibromyalgia in 2009. It has taken years and years before it has made its way in the mainstream. With the onset of 10s of thousands of long Covid suffers western medicine can no longer ignore chronic inflammations linked to chronic pain and fatigue as well as brain fog and all the rest of the symptoms.