Interesting article on that topic here. I’m unsure how the Frontier Device deals with this: https://www.sciencedirect.com/science/article/abs/pii/S1746809415000105

Let me preface this by saying that I am a paramedic and well-versed in reading ECG’s. When they talk about normal morphology, they are meeting that your heart has no electrical abnormalities that would change the conduction routes through the heart. Normal rhythms would be considered to be regular between beats, with a heart rate, less than 1…Read More

I just recorded 5 min strip. I had 8 pvcs but it said I was in an other rhythm for 33% of the time.