Can you quote the part that leads you to think that? At first I was just commenting on the title, but see the edit. I would agree, my interpretation makes this the most ridiculous hype I have ever seen, so maybe I missed something.
1 - 200/6158 = 97% is indeed a pretty suspicious coincidence though. I would assume/hope that they've shuffled a big dataset of recorded heart events (like the image in the TC article) and that the 200 people diagnosed with paroxysmal atrial fibrillation only rarely experience AF, so the number of true positives is probably far smaller than 1% of the dataset.