As I was reading your post I kept shaking my head. I had a cardioversion in the hospital after my Dr.sent me in with a HR of 170, Converted to NSR but it only lasted for a month. I am on the same meds that you are on and have the same symptoms. AFib leaves you with a decreased cardiac output so sometimes when your heart beats there isn't full capacity in the ventricle so less blood gets pumped out. It seems there is no exact cause for AFib. It could start after a heart attack or just be a result from an aging heart. After a serious reaction to fleckanide I am not on any anti-arrhythmic meds now, just something to keep my BP and PR in check. Fleckanide put me into AFlutter which really isn't any better. I have been offered oblation, sleep studies, cardioversion, meds, etc. I have severe arthritis which decreases my quality of life the most so I am ignoring my AFib/Flutter. This must drive my cardiologist crazy but at least he isn't too pushy.
My cardiologist practice has a Coumadin Care Center at several locations so my INR is checked once every 1-4 weeks depending on the last. They do this by fingerstick which gives quick results and the technician can adjust the dose and schedule another appointment. When I first got out of the hospital I was scheduled to see the cardiologist right away. 4 weeks is too long. Since I am stable (except for INR), I only see him every 6 months.
My family doctor says the vagus nerve can be quieted with Prevacid and if it is irritable it can cause irregular heart beats. I have GERD and if I go off the Prevacid, my heart acts up. I think it's good to have something every couple of hours in your stomach, because the acid can build up and cause trouble. I am on an anti-arrythmic, Norpace, for my Afib. Previously Atenolol, taken in 1/4's and delaying a dose when my bp or hr was too low worked for me. Now I am on Atenolol, Coumadin, and Xanax as well as the Norpace and it's kept me out of the hospital for nearly 3 months. Hope some of this helps -- good luck to you.
I have GERD and get the same thing as you do, Saint. Except that mine will begin around the ear and lower jaw, then travel downward to the chest area. I've had this for at least a dozen years and once when on a heart monitor. The monitor showed nothing abnormal with the heart, so it has to be related to something else, maybe heartburn? Not sure why it starts in my jaw first, but it's a very intense, sharp pain. The only way I can get relief is by drinking water, as you do. Because it's so very painful and will not go away for awhile unless I drink water, I carry water with me whenver I have to go out, even though it only happens maybe twice a month.
Sounds like what I go through with GERD. The first time I had a spasm I did think it was a heart attack, but I wasn't sweaty. It felt like drinking water was the right thing to do. You should try it if you haven't. I try to swallow as much water in a single swallow as I can. It feels like it "stretches" the spasm area. I do it until I can feel a lessening of the pain, which is usually 3 to 5 gulps. I don't know how I would handle this if it went on for several hours. It usually resolves after about 15/20 minutes.
Maybe it's coincidental, maybe not, but I had discontinued my Prilosec for about 2 months before the A-Fib start up. I don't think I'll do that again.
If I understand, you HR is too low, and so the usual need to lower the (Ventricle) HR by blocking some of the signals due to AFib isn't needed, or not as much.
You said you have dropped you Beta Blocker to 50 mg a day, is it slow release? It should be I believe. Normal release don't hold for more than a few hours, less than 12 I believe.
If you have low BP and HR, then it is expected that you should have dizzy problems. I'd check with the doctor about lowering you BB further, or if not that to split the pill in half and take half morning and the other half at bed time... I've read that approach being taken by many who have unwanted side-effects from a BB.
I just want to comment on the pain that radiates from your stomach to your jaw. I actually get the same thing, quite often, and it actually runs to the left side of my head (above the jaw). I suffer from GERD and get esophageal spasms. Sometimes that pain will last several hours. I have no doubt it is the vagal nerve. There really is nothing else it could be. I also get the sick feeling when I'm hungry. I've been on prevacid for over 10 years, tried others, but this works the best. I also have a hiatal hernia.