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.
Representative ECGs from wild-type, Nhlh1−/−, and KH mice at rest (A), during the first 5 s after diving (B), after 1 min in water (C), and during the recovery period after stress (D). The scale bar underneath the wild-type ECG in column A represents 100 ms. The arrowheads in column C indicate premature ventricular complexes and couplets during swimming.
