Figure 1.
An example of a heartbeat waveform across a 3-second time window. The R-wave peaks are the most positive deflection observed in the waveform. The R-R intervals are the time difference between each R-wave peaks.
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.