Apple Watch ECG and recorded Heart Rate data

When I'm having runs of PVCs and/or PACs the ECG app on my Apple Watch will say "Inconclusive." Have others had this experience? I'm not sure how much credence the cardiologists give to data from Apple Watch and other fitness devices.

Also, when I look at my heart rate range for each day I almost always see a very high heart rate number at the top of the range. It occurs when I go from a mostly low level of activity to, say, walking out the door and over to the mailboxes, or getting up from sitting and picking up a basket of laundry. Those high rates only last a second or two at most but they are extreme (139, 119, 121, 142, and even a 159). I don't' even achieve these highs when I'm on the elliptical at the gym.

I don't know if these high numbers reflect a rate hyper-reactivity to the change in activity level, or if it's just something funky in the Apple Watch's algorithm. I should add: I'm a new poster here, I have LBBB.

I guess I'm just curious about others' experiences with cardiac data from their Apple Watch.