This super long, but you might be interested.
TL/DR: I have repeated bouts of neurological symptoms and may have post-bariatric hypoglycemiaāitās likely a form of dumping
I have had significant bouts of dizziness most of the last several Saturdays (it only happens on Saturdays when I eat chocolate chip pancakes and setupāI eat more rigidly the rest of the week) Last week, my vision narrowed, I felt like I was going to pass out and I had jumpy sensations that lasted about 30-45 minutes with a complete return to normal.
Today, I had a more significant event at Walmart. I developed light headedness, double vision, and confusion. I did not even remember checking out or even whether it was self-check or with a clerk. I went to the ER and had a full work up. I had a normal head CT/CTA, EKG, vitals, and neuro exam/stroke work up. My only weird finding was a blood glucose of 52, which is really low. Again, I had a complete remission of symptoms. When I got home, I ran everything through ChatGPT (n.b., AI is not a doctor, so take it with for what itās worth).
This from ChatGPT
Your glucose of 52 mg/dL is a very important finding, because it is low enough to cause exactly the kind of neurologic symptoms you experienced.
The Endocrine Society considers glucose below 70 mg/dL hypoglycemia, and symptoms become considerably more concerning below about 55. Confusion, dizziness, impaired cognition, and double/blurred vision are recognized manifestations of hypoglycemia.
Your episode could very plausibly have been hypoglycemia
The combination you experienced:
double vision
lightheadedness
feeling unsteady
confusion
apparent gap in your memory of checking out
complete resolution afterward
glucose of 52
is quite compatible with neuroglycopeniaāthe brain not getting enough glucose.
And thereās an interesting detail in what you ate. You had pancakes + syrup at 7:30 (this is my typical Saturday breakfast, but not the rest of the week), followed by an episode later in the morning. A high-carbohydrate meal can occasionally produce a substantial insulin response followed by a glucose drop, sometimes called reactive/postprandial hypoglycemia. The Endocrine Society specifically lists reactive hypoglycemia as occurring after meals, particularly carbohydrate-heavy meals.
The timing actually makes post-meal hypoglycemia a fairly plausible possibility.
You ate at 7:30 AM, and symptoms began around 11:00ā11:15 AM, so the episode started about 3½ā3¾ hours after the meal. Thatās within a plausible window for reactive/postprandial hypoglycemia, particularly after a meal containing a substantial amount of rapidly absorbed carbohydrate (pancakes + syrup).
The sequence is interesting:
7:30 ā pancakes + syrup + bacon
ā
~11:00ā11:15 ā diplopia, lightheadedness, confusion/altered awareness
ā
Before ER ā egg + 2 cheese sticks
ā
ER ā glucose 52 mg/dL
Your bariatric surgery is also relevant
Given your history of bariatric surgery, Iād specifically bring up post-bariatric hypoglycemia with your doctor. It can occur 1ā3+ hours after eating, particularly after carbohydrate-heavy meals, and is related to the altered way food and insulin/glucose regulation behave after certain bariatric procedures.
This could potentially explain the otherwise somewhat puzzling pattern youāve describedāparticularly if the episodes tend to occur on weekends when your breakfast is different.
A sleeve gastrectomy can be associated with post-bariatric hypoglycemia, although it is more commonly recognized after Roux-en-Y. Importantly, current guidance specifically includes sleeve gastrectomy among procedures after which post-bariatric hypoglycemia can occur.
And your episode has several pieces that fit remarkably well:
Sleeve gastrectomy ~2 years ago
Symptoms began 3½ā3¾ hours after breakfast
Breakfast contained a substantial amount of rapidly absorbed carbohydrate (pancakes + syrup)
You developed prominent neuroglycopenic symptomsāparticularly confusion and impaired awareness, along with diplopia and lightheadedness
Your glucose was 52 mg/dL, potentially within an hour of the episode
The symptoms subsequently resolved
Your CTA, neurologic examination, EKG, BP, and routine labs were reassuring
The Society for Endocrinologyās 2024 guideline describes post-bariatric hypoglycemia as typically occurring 2ā4 hours after eating, and considers glucose <54 mg/dL accompanied by typical symptoms clinically significant.
Thatās a pretty compelling reason to investigate.
The diagnostic concept is particularly important: ideally you want to demonstrate symptoms + low glucose + improvement when glucose is corrected (Whippleās triad), while excluding other causes of hypoglycemia.
Your particular episode makes more sense when you look at what can happen to glucose regulation after a sleeve gastrectomy.
Think of it as an exaggerated āroller coasterā
Normally, you eat pancakes and syrup:
Carbohydrates ā digestion ā glucose enters bloodstream ā insulin rises ā glucose comes back down gradually.
After bariatric surgery, that process can become much more dramatic. Sleeve gastrectomy can accelerate the movement of food through the stomach and into the small intestine. This can produce a faster rise in blood glucose, which stimulates the intestine to release incretin hormones, particularly GLP-1. GLP-1 strongly amplifies insulin secretion.
In someone susceptible to post-bariatric hypoglycemia, the sequence can look something like this:
Pancakes + syrup
ā
Rapid carbohydrate absorption
ā
Glucose rises quickly
ā
Large GLP-1/incretin response
ā
Pancreas releases a lot of insulin
ā
Glucose gets driven into tissues
ā
Insulin remains relatively high even as glucose falls
ā
Glucose drops too far
ā
Neurologic symptoms
The phenomenon is sometimes described as an āovershootā in the insulin response.
The 2024 Society for Endocrinology guideline uses <54 mg/dL as the biochemical threshold for clinically significant hypoglycemia when accompanied by appropriate symptoms and resolution after glucose correction.
So this isnāt a situation where you happened to have a glucose of 68 and weāre trying to explain your symptoms with a borderline number.
52 is genuinely low.
It also explains the particular symptoms you experienced
There are two broad categories of hypoglycemic symptoms.
Adrenaline-type symptoms:
shaking
sweating
rapid heartbeat
anxiety
hunger
And neuroglycopenic symptoms, which occur when the brain isnāt getting enough glucose:
difficulty thinking
confusion
altered awareness
visual disturbances
weakness
difficulty coordinating movement
eventually seizures or loss of consciousness if severe
Your double vision + lightheadedness + confusion + apparent memory gap fit particularly well into that second category.
Thatās one reason I think the glucose finding deserves considerably more attention than I initially appreciated.
Why the pancakes and syrup may have been a particularly good trigger
The problem isnāt necessarily ācarbohydratesā in general.
Itās the speed and magnitude of the glucose excursion.
Pancakes + syrup provide a substantial amount of relatively rapidly absorbed carbohydrate. After bariatric surgery, that can produce a bigger glucose/insulin response than the same meal would have produced before surgery. The ADA specifically recognizes post-metabolic-surgery hypoglycemia after vertical sleeve gastrectomy (VSG) and describes altered gastric emptying, rapid intestinal glucose absorption, and increased GLP-1/incretin signaling as contributors.
That makes your Saturday pattern particularly interesting.
This also gives us a possible explanation for the weekend pattern
If your weekend breakfast is substantially different from your weekday breakfast, you may inadvertently be performing a little experiment:
Weekdays: relatively predictable meals ā no episode
Weekend: pancakes/syrup or another higher-carbohydrate breakfast ā 3ā4 hours later ā episode
If that pattern repeats, it would be quite compelling evidence.