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.
Heart rate dependence of ECG parameters. (A) QT interval, (B) Tp–Te, (C) Th and (D) QRS duration. For each box plot, the center line marks the mean value, the outer box edges the 25th and 75th percentile and the “whiskers” denote the 5th and 95th percentile.
