It's not a carb thing, it's an electrolyte thing:

The heart palpitations are probably due to low potassium for a prolonged period of too low sodium levels. I'm not sure how much potassium or sodium you are getting in a day, but they both probably need to be dramatically increased. On keto, we dump lots of sodium, so we need more than what the USDA guidelines are. Long term low sodium levels cause even lower potassium levels, especially if you aren't getting enough in your diet. So you will need more than the USDA recommended allowance for potassium. Don't be afraid of salt! Use lots of it lol, and find more sources for your potassium like spinach, and avocados. Hope this helps :-)

Ok so 1 serving of that Low Salt is only 300mg sodium, and only 400mg potassium. You need minimum around 3000mg of potassium a day (depending on your needs, I need 3500), and for sodium, I need on keto 2000-3000mg a day or I feel like ****. Really. I know, I know, the USDA says otherwise but ask any other long term Keto pal, and they will tell you the same; that salt intake is to be encouraged! Low Salt is great for getting your potassium, but you really need to kick it up lol. On your diary settings, you can add potassium as a nutrient to monitor. On the mobile app, the sodium automatically shows up in the Nutrient Details. Hope this helps!

What is one serving?...

Ok, so for working out a lot, you need to replace your electrolytes even more, and possibly increase your calories more. I would have 2 tsp a day of the So Low Salt to get both the potassium and sodium. Add more regular salt for the cardio that you do.

Another thing you can be coming up against is if when on a calorie restricting diet, and you restrict your calories too much, you can actually cause your thyroid to become dysfunctional. Hypothyroidism also fits this scenario. Please google it and talk to your doc.

I'm not sure how many calories you are taking in a day. On keto, remember, going higher on calories is okay! Don't get stuck in the old mindset of calories in calories out. That's why you are trying keto, because of how different it is. Keto is more of a Ratio life style. To lose weight, we restrict our carbs, to maintain, we increase until we stop losing weight. It's a complete mind f*** for a lot of folks. And people run into problems when they combine both calorie restriction with ratio control. It's one or the other, not both. Even I still have a hard time with that concept. When I restrict my calories too much, my weight loss on keto STALLS!

And one more thing, I believe you said earlier that you are very restrictive on your carbs also, below 20? A lot of people stay in Keto up to 50 grams. Maybe upping your carbs to 20-25 grams wouldn't be a bad thing. Each or our organs can be selective in its uptake or resistance of glucose. So even though your blood glucose level may be normal on 15 grams of carbs, maybe your brain would function just a bit better on 20 or 25. Now, this is going really deep into neuroscience, and I could go on and on lol.

Good luck!

I'm glad you went to your doc. I hope they drew labs along with the ecg and x ray. Please update us on how you feel! It sucks when you try to improve your life, and then things go wrong.

Best wishes

Nina

I've recently begun supplementing magnesium citrate. I was getting tons of Na and K but still felt crappy/had legs cramps at night. The mag cit has helped A LOT.

I had the same/similar thing last week

At first, I thought it was keto-related and then thought maybe stress/anxiety caused it, but after 4 days of it, went to dr.
for EKG and chest x-ray and blood work and he found my white blood cell count was really low and determined virus caused it. I've since spoken with about 4-5 other people who also experienced this lately and all were determined to be viruses. It went away after about 5 days

Not sure if it's related to your situation or not, but thought I'd throw it out there.

This year has SUCKED for viruses! Though most of the people I encounter have had the nasty one that has lasted for 3 weeks, myself included. Ugh, it really did put a damper on my routine. I laid back, and took it slow with the workouts, not much in cardio or strength. Not much you can do but relax and rule out any other any other conditions. What has made it worse, that a lot of people are testing low in vitamin D (bad for immunity). It's hard to get that in the winter, and this winter in my area has been especially hard. Praying for more sun so I can soak up some more vitamin D!

For now, the only thing you can do is wait for results from blood work and rest. That's not giving up :-)

What was your sodium level in the blood?

Its almost border line, I am at 135 in sodium levels. I get dizzy in the nights on days of high intensity work outs or when I don't get enough sodium. Those high intensity work outs are rare for me though.

drink a couple cups of broth...check for carb content...that usually does the trick

How are you doing? Have you supplemented magnesium? Hopefully your doctor checked that too...

satinribbons, what blood work did your doc do? It seems like your metabolic panel was fine, and I'm assuming that your cbc-dif came back fine showing that you are not fighting a virus or anything bacterial, but I'm wondering if any hormone levels were tested.

Wow, just reading through this got me riled up! I'm so glad you posted an update and found a doctor who found the issue! It really interests me because since I got my heart radiated, I've noticed I can hear it pounding quite loudly, especially at night, but at other times, too. I'm pretty sure, just instinctively, that it's from the radiation. But you had me hanging on every line of this like a Stephen King movie!

Hope you're feeling better and can exercise (healthily) again soon!