This is strange, but might be of value to someone reading this.

I had preexcitation. My right ventricle would pulse early, and then there was a delay that felt like a skipped beat. I used to eat a lot of carbs to help control it. (Not my conscious action, just learned over time.) A few years ago I had this corrected. 5 1/2 hours and six catheters later, they had burned part of my heart, frozen part, and they "balanced" the heart. I still get the preexcitation arrhythmia, but my whole heart get's them, so it is never a problem. What a difference.