Interesting scenario to run by the group on this topic. Have been on keto diet for approximately 90 days; after about 45 began a rigorous exercise program and frankly have been feeling GREAT. Three days ago mid workout, got heart palpitations and clear arrhythmia. Felt like a brady-tachy; following palpitation heart rate slowed down, sped up and then normalized within minutes. Repeated only when exercising at moderate to high intensity.
Yes, getting checked out by PCP and cardiologist next week.
However here is the interesting part in line with this discussion: some 10 days prior I stopped taking my daily 400 mg magnesium glycinate cold turkey (suspected it might be behind some gastric upset). This was combined with a new workout retainer that left me probably more fluid depleted (via perspiration) than I have have been. Adding 2+2 and lurking in these and other forums I am beginning to think there must be a connection.
Finally, I have resumed the magnesium and have ordered ReMag.