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.
This graph illustrates the heart rates for 14 (out of the 30) participants who have developed bifid T waves during at least one study period. Open squares indicate normal T waves; filled squares indicate bifid T waves. Although bifid T waves seem to appear at higher heart rates, this observation cannot be the only explanation.
