Comment on

• Mobile Photoplethysmographic Technology to Detect Atrial Fibrillation.

  Guo Y, Wang H, Zhang H, Liu T, Liang Z, Xia Y, Yan L, Xing Y, Shi H, Li S, Liu Y, Liu F, Feng M, Chen Y, Lip GYH; MAFA II Investigators. Guo Y, et al. J Am Coll Cardiol. 2019 Nov 12;74(19):2365-2375. doi: 10.1016/j.jacc.2019.08.019. Epub 2019 Sep 2. J Am Coll Cardiol. 2019. PMID: 31487545
• Watch Carefully: Interpreting Positive Predictive Values With Wearable Devices.

  Cheung CC, Andrade JG, Krahn AD. Cheung CC, et al. J Am Coll Cardiol. 2020 Mar 24;75(11):1363-1364. doi: 10.1016/j.jacc.2019.09.073. J Am Coll Cardiol. 2020. PMID: 32192667 No abstract available.
• Smart Watch Devices for Atrial Fibrillation Screening: It Has to Start Somewhere.

  Sepehri Shamloo A, Bollmann A, Dagres N, Arya A, Hindricks G. Sepehri Shamloo A, et al. J Am Coll Cardiol. 2020 Mar 24;75(11):1364-1365. doi: 10.1016/j.jacc.2019.10.063. J Am Coll Cardiol. 2020. PMID: 32192668 No abstract available.
• The Efficacy and Feasibility of Atrial Fibrillation Screening Using Photoplethysmography-Based Smart Devices.

  Ananthan K. Ananthan K. J Am Coll Cardiol. 2020 Mar 24;75(11):1365-1366. doi: 10.1016/j.jacc.2019.09.074. J Am Coll Cardiol. 2020. PMID: 32192669 No abstract available.
• Atrial Fibrillation Episodes Detected Using Photoplethysmography: Do We Know Which Are True?

  Eerikäinen LM, Bonomi AG, Dekker LRC, Aarts RM. Eerikäinen LM, et al. J Am Coll Cardiol. 2020 Mar 24;75(11):1365. doi: 10.1016/j.jacc.2019.10.064. J Am Coll Cardiol. 2020. PMID: 32192670 No abstract available.