Figure 1 A: The BigThumb system. With two thumbs of users on the device,
a bECG will be collected. B: Software interface of the BigThumb. Users
are asked if there is a symptom when bECG is collected. C: A bECG
collected by a patient with atrial fibrillation. D: Summary of bECG in
one-month duration. The red points show the bECG with atrial
fibrillation and the green points show the sinus rhythm.
Table 1. Characteristics Between Patients in BT and TF Groups