Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2020 Jan 22;4(1):e14857. doi: 10.2196/14857

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

©Tomohiko Inui, Hiroki Kohno, Yohei Kawasaki, Kaoru Matsuura, Hideki Ueda, Yusaku Tamura, Michiko Watanabe, Yuichi Inage, Yasunori Yakita, Yutaka Wakabayashi, Goro Matsumiya. Originally published in JMIR Cardio (http://cardio.jmir.org), 22.01.2020.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Cardio, is properly cited. The complete bibliographic information, a link to the original publication on http://cardio.jmir.org, as well as this copyright and license information must be included.

PMC Copyright notice

Time series trend curves during atrial fibrillation (event number 18). The figure compares the trend curve of the Apple Watch W mode pulse rate (red curve) with that of the electrocardiography-based heart rate (blue curve). The 2 trend curves follow a similar pattern and therefore appear almost identical (cross-correlation function 0.83; P<.001). AF: atrial fibrillation; bpm: beats per minute.