Great questions. The Apple Watch is a single lead, so doesn't have the resolution to do the computations. Also, the algorithms aren't trivial for automation this, but the data moat is extremely important for capturing and appropriately testing this population. There is prior art, which our own filing took into accout. Lastly, the hardware devices we use are all FDA approved to measure the appropriate interval, one of which is FDA approved 12-lead ECG patch approved for patient self-administration.
Excellent points. Artifact is indeed a tricky problem for EKGs, and the ziopatch is a great device. Generally, multiple leads are needed (ideally 6 or 12 leads) to accurately measure repolarization of the heart.
