I see other rhythm on mine too, but it’s only like one percent. It’s probably just a noise. Their ECG‘s are pretty darn good actually.

My “Other rhythm” beats turn out to be an occasional PVC, a slightly more occasional PAC, and noise. The noise is my fault for moving around on the bike and not having my strap tight enough. The PACs and PVCs are real, but not an issue… yet. I had AFIB and Atrial Flutter, both of which succumbed to a catheter ablation, so I watch what happens when I put my heart under stress training to race. This is the only device that makes reasonable sense. Will be seeing my electrophysiologist next week and I will get his opinion on these beats.