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.
The QRS need to fit in the rectangular space (correct profile or acceptable lead). In the acceptable profile the T wave need to be encased within the screening profile (acceptable vs. unacceptable profile).
