Figure 1.
Photoplethysmogram features and measurement sites of single-source photoplethysmography (PPG) in studies conducted between January 2010 and January 2019.
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.