Postprandial tachycardia

I seem to develop postprandial tachycardia. It particulary seems to happen if I eat a lot of simple carbs.  Today my rate reached 175.  I get short of breath.  It seems to happen about 1/2 hour to 45 minutes after eating and lasts 15-30 minutes.  The rate then slowly decreases back to 90-110's. I work in a cardiology office and the I caught this on a monitor today and it almost looks like 2:1 flutter in some of the strips with some of the p waves burried.  Any thoughts?  Valsalva does not decrease the rate.

[Jerry_NJ]

Well, what does the "cardiology office" think?  Best thing I can come up with at this level of information is limit carbohydrates - yes I know it is hard, I love them too, almost as much as chocolate which I also have to avoid because of the caffeine, not to mention calories (never mention calories : >)  )